# MCQs for Science Class 10 with Answers Chapter 10 Light Reflection and Refraction

Students of class 10 Science should refer to MCQ Questions Class 10 Science Light Reflection and Refraction with answers provided here which is an important chapter in Class 10 Science NCERT textbook. These MCQ for Class 10 Science with Answers have been prepared based on the latest CBSE and NCERT syllabus and examination guidelines for Class 10 Science. The following MCQs can help you to practice and get better marks in the upcoming class 10 Science examination

## Chapter 10 Light Reflection and Refraction MCQ with Answers Class 10 Science

MCQ Questions Class 10 Science Light Reflection and Refraction provided below have been prepared by expert teachers of grade 10. These objective questions with solutions are expected to come in the upcoming Standard 10 examinations. Learn the below provided MCQ questions to get better marks in examinations.

Question. The image formed by a concave mirror is observed to be virtual, erect and larger than the object. then the position of the object should be-
(A) between the focus and the centre of curvature
(B) at the centre of curvature
(C) beyond the centre of curvature
(D) between the pole of the mirror and the focus

D

Question. A convex lens forms a real image of a point object placed on its principal axis. If the upper half of the lens is painted black.
(A) the image will be shifted backward
(B) the image will not be shifted
(C) the intensity of the image will decrease
(D) both (B) and (C)

D

Question. The minimum distance between an object and its real image formed by a convex lens of focal length f is-
(A) f
(B) 2f
(C) 3f
(D) 4f

D

Question. An object 0.5 m tall is in front of a plane mirror at a distance of 0.2 m. The size of the image formed is-
(A) 0.2 m
(B) 0.5 m
(C) 0.1 m
(D) 1 m

B

Question. A thin layer of water is transparent but a very thick layer of water is-
(A) translucent
(B) opaque
(C) most transparent
(D) none of these

A

Question. The critical angle for light going from medium X into medium Y is Θ. The speed of light in medium X is ν. The speed of light in medium Y is-
(A) ν (1 – cos Θ)
(B) ν/cos Θ
(C) ν cos Θ
(D) ν/sin Θ

D

Question. Refractive index of glass with respect to air is 1.5 and refractive index of water with respect to air is 4/3. What will be the refractive index of glass with respect to water ?
(A) 1
(B) 1.5
(C) 1.125
(D) –10

C

Question. The speed of light in vacuum is 3.0 × 108 m/s.
If the refractive index of a transparent liquid is 4/3, then the speed of light in the liquid is-
(A) 2.25 × 108 m/s
(B) 3 × 108 m/s
(C) 4 × 108 m/s
(D) 4.33 × 108 m/s

A

Question. A swimming pool appears to be 2m deep. Its actual depth is (μ for water = 1.33)-
(A) 2.66 m
(B) 2 m
(C) 2.34
(D) 2.54 m

A

Question. A boy is standing in front of a plane mirror at a distance of 3m form it. What is the distance between the boy and his image ?
(A) 3 m
(B) 4.5 m
(C) 6 m
(D) none of these

C

Question. To get a real and inverted image of the same size as that of the object the object should be placed in front of the convex lens at-
(A) F
(B) 2F
(C) between F and 2F
(D) away from 2F, where F is focus

B

Question.The magnification produced by a concave mirror –
(A) is always more than one
(B) is always less than one
(C) is always equal to one
(D) may be less than or greater than one

D

Question. A student needs a lens of power –2.0 diopter to correct his distant vision. The focal length of the given lens is-
(A) +50 cm
(B) –50 cm
(C) 100 cm
(D) –100 cm

B

Question. A convex lens is –
(A) Thicker at the middle, thinner at the edges
(B) Diverging
(C) Thicker at the edges thinner in the middle
(D) Of uniform thickness everywhere

A

Question. The image formed by a concave mirror is real, inverted and of the same size as that of the object. The position of the object should be-
(A) Beyond C
(B) Between C and F
(C) At C
(D) At F

C

Question. A glass rod of refractive index 1.42 is immersed in kerosene. The refractive index of kerosene is 1.42. Then the rod will-
(A) appear bent
(B) appear raised above the liquid
(C) become invisible
(D) none of the above

C

Question. The refractive index of a medium depends upon-
(A) Nature of material of the medium
(B) Optical density of the medium
(C) Wavelength of light
(D) All of these

D

Question. If refractive index of water w.r.t. air is 4/3, then refractive index of air w.r.t. water will be-
(A) 4 × 3
(B) 3/4
(C) 4/3
(D) 3/4

B

Question. A thin lens is made with a material having refractive index μ = 1.5. Both the sides are convex. It is dipped in water (μ = 1.33). It will behave like-
(A) convergent lens
(B) a divergent lens
(C) a rectangular slab
(D) a prism

A

Question. The image of the moon is formed by a concave mirror whose radius of curvature is 4.8 m at a time when distance from the moon is 2.4 × 108 m . if the diameter is of the image is 2.2 cm, the diameter of the moon is-
(A) 1.1 × 106 m
(B) 2.2 × 106 m
(C) 2.2 × 108 m
(D) 2.2 × 1010 m

B

Question. Choose the correct option-
(A) If the final rays are converging, we have a real image
(B) If the incident rays are converging, we have a real image
(C) If the image is virtual, the corresponding object is called a virtual object
(D) The image of a virtual object is called a virtual image

A

Question. A spherical mirror and a spherical lens each have focal length of –10 cm. The mirror and lens are-
(A) both convex
(B) both concave
(C) mirror is convex and lens is concave
(D) mirror is concave and lens is convex

B

Question. The power of a lens having focal length 50 cm is-
(A) 1/2D
(B) 2D
(C) 3D
(D) 0.2 D

B

Question. Which of the following mirror is used by a dentist to examine a small cavity?
(A) Convex mirror
(B) Plane mirror
(C) Concave mirror
(D) Combination of convex and concave mirror

C

Question. When the object is placed between f and 2f of a convex lens, the image formed is
(A) at f
(B) at 2f
(C) beyond 2f
(D) between O and f

C

Question. A ray of light is travelling from a rarer medium to a denser medium. While entering the denser medium at the point of incidence, it
(A) goes straight into the second medium
(B) bends towards the normal
(C) bends away from the normal
(D) does not enter at all

B

Question. Assertion: Cannot see the distant object clearly.
Reason: The far point of an eye suffering j, from myopia is less than infinity.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is not the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
(E) Both A and R are false.

B

Question. An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get
(A) shortened and real
(B) enlarged and real
(C) enlarge and virtual
(D) diminished and virtual

D

Question. A full length image of a distant tall building can definitely be seen by using
(A) a concave mirror
(B) a convex mirror
(C) a plane mirror
(D) both concave as well as plane mirror

B

Question. The refractive index of water is 1.33. The speed of light in water will be
(A) 1.33 × 108 m/s
(B) 3 × 108 m/s
(C) 2.26 × 108 m/s
(D) 2.66 × 108 m/s

C

Question. Where should an object be placed in front of convex lens to get a real image of the size of the object?
(A) At the principal focus of the lens.
(B) At twice the focal length
(C) At infinity
(D) Between the optical centre of the lens and its principal focus.

B

Question. The power of a lens is – 4.0 D. what is the nature of the lens?
(A) Plane
(B) Concave
(C) Convex
(D) Plano convex

B

Question. An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is
(A) – 30 cm
(B) 30 cm
(C) – 15 cm
(D) +15 cm

C

Question. A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
(A) 15
(B) 20
(C) 30
(D) 0

D

Question. As light travels from a rarer to a denser medium it will have
(A) increased velocity
(B) decreased velocity
(C) decreased wavelength
(D) both (b) and (c)

D

Question. The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be:
(A) real, inverted and diminished in size
(B) real, inverted and enlarged in size
(C) virtual, upright and diminished in size
(D) virtual, upright and enlarged in size

C

Question. You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is
(A) A
(B) B
(C) C
(D) equal in all three media

B

Question. When object moves closer to convex lens, the image formed by it shift
(A) away from the lens
(B) towards the lens
(C) first towards and then away from the lens
(D) first away and then towards the lens

A

Question. A magnified real image is formed by a convex lens when the object is at
(A) F
(B) between F and 2F
(C) 2F
(D) only (a) and (b) both

D

Question. Which mirror can produce a virtual, erect and magnified image of an object?
(A) Concave mirror
(B) Convex mirror
(C) Plane mirror
(D) Both concave and convex mirrors

A

Question. The image formed by a convex lens can be
(A) virtual and magnified
(B) virtual and diminished
(C) virtual and of same size
(D) virtual image is not formed

A

Question. Image formed by reflection from a plane mirror is
(A) real and inverted
(B) virtual and erect
(C) real and erect
(D) virtual and inverted

B

Question. If a man’s face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be
(A) 75 cm
(B) 25 cm
(C) 15 cm
(D) 60 cm

A

Question. Where should an object be placed in front of a convex lens to get real image of the size of the object?
(A) At focus
(B) At 2F
(C) At Infinity
(D) Between optical centre and focus.

B

Question: The angle of incidence for a ray of light having zero reflection angle is
(A) 0
(B) 30°
(C) 45°
(D) 90°  A

Question: An object is placed at a distance of 0.25 m in front of a plane mirror. The distance between the object and image will be
(a) 0.25 m
(b) 1.0 m
(c) 0.5 m
(d) 0.125 m

C

Question: Which of the following mirror is used by a dentist to examine a small cavity?
(A) Convex mirror
(B) Plane mirror
(C) Concave mirror
(D) Combination of convex and concave mirror

C

Question: For a real object, which of the following can produce a real image?
(A) Plane mirror
(B) Concave mirror
(C) Concave lens
(D) Convex mirror

B

Question 6. An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get
(A) shortened and real
(B) enlarged and real
(C) enlarge and virtual
(D) diminished and virtual

D

Question: A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
(A) 15
(B) 20
(C) 30
(D) 0

D

Question: An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is
(A) – 30 cm
(B) 30 cm
(C) – 15 cm
(D) +15 cm

C

Question: The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of object should be
(A) at the focus
(B) at the centre of curvature
(C) between focus and centre of curvature
(D) beyond centre of curvature

C

Question: The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is
(A) real, inverted and diminished
(B) virtual, erect and smaller in size
(C) real, inverted and enlarged
(D) virtual, upright and enlarged

C

Question: A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at
(A) 25 cm
(B) 40 cm
(C) 10 cm
(D) At infinity

C

Question: The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be
(A) real, inverted and diminished in size
(B) real, inverted and enlarged in size
(C) virtual, upright and diminished in size
(D) virtual, upright and enlarged in size

C

Question: As light travels from a rarer to a denser medium it will have
(A) increased velocity
(B) decreased velocity
(C) decreased wavelength
(D) both (b) and (c)

D

Question: If a man’s face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be
(A) 75 cm
(B) 25 cm
(C) 15 cm
(D) 60 cm

A

Question: The angle of incidence i and refraction r are equal in a transparent slab when the value of i is
(A) 0°
(B) 45°
(C) 90°
(D) depend on the material of the slab

D

Question: The refractive index of transparent medium is greater than one because
(A) Speed of light in vacuum < speed of light in tansparent medium
(B) Speed of light in vacuum > speed of light in tansparent medium
(C) Speed flight in vacuum = speed of light in tansparent medium
(D) Frequency of light wave changes when it moves from rarer to denser medium

B

Question: The refractive index of water is 1.33. The speed of light in water will be
(A) 1.33 × 108 m/s
(B) 3 × 108 m/s
(C) 2.26 × 108 m/s
(D) 2.66 × 108 m/s

C

Question: Light from the Sun falling on a convex lens will converge at a point called
(A) centre of curvature
(B) focus
(D) optical centre

B

Question: Large number of thin stripes of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be
(A) a zebra of black stripes
(B) a horse of black stripes
(C) a horse of less brightness
(D) a zebra of less brightness

C

Question: You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is
(A) A
(B) B
(C) C
(D) equal in all three media

B

Question: When object moves closer to convex lens, the image formed by it shift
(A) away from the lens
(B) towards the len
(C) first towards and then away from the lens
(D) first away and then towards the lens

A

Question: When object moves closer to a concave lens the image by it shift
(A) away from the lens on the same side of object
(B) toward the lens
(C) away from the lens on the other side of lens
(D) first towards and then away from the lens

B

Question: A magnified real image is formed by a convex lens when the object is at
(A) F
(B) between F and 2F
(C) 2F
(D) only (a) and (b) both

D

Question: A divergent lens will produce
(A) always real image
(B) always virtual image
(C) both real and virtual image
(D) none of these

B

Question: A light ray enters from medium A to medium B as shown in figure. The refractive index of medium B relative to A will be
(A) greater than unity
(B) less than unity
(C) equal to unity
(D) zero

B

Question: A10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this
mirror is
(A) – 30 cm
(B) – 20 cm
(C) – 40 cm
(D) – 60 cm

B

Question: A beam of light is incident through the holes on side A and emerges out of the hole on the other face of the box as shown in the figure. Which of the following could be
inside the box?
(A) Concave lens
(B) Rectangular glass slab
(C) Prism
(D) Convex lens

D

Question: Which of the following statements is/are true?
(A) A convex lens has 4 dioptre power having a focal length 0.25 m
(B) A convex lens has -4 dioptre power having a focal length 0.25 m
(C) A concave lens has 4 dioptre power having a focal length 0.25 m
(D) A concave lens has – 4 dioptre having a focal 0.25 m

A

Question: Magnification produced by a rear view mirror fitted in vehicles
(A) is less than one
(B) is more than one
(C) is equal to one
(D) can be more than or less than one depending upon the position of the object in front of it.

A

Question: Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the figure. Which of the following could be inside the box?
(A) A rectangular glass slab
(B) A convex lens .
(C) A concave lens
(D) A prism

A

Question: In torches, search lights and headlights of vehicles the bulb is placed
(A) between the pole and the focus of the reflector
(B) very near to the focus of the reflector
(C) between the focus and centre of curvature of the reflector
(D) at the centre of curvature of the reflector

B

Question: The laws of reflection hold good for
(A) plane mirror only
(B) concave mirror only
(C) convex mirror only
(D) all mirrors irrespective of their shape

D

Question: A full length image of a distant tall building can definitely be seen by using
(A) a concave mirror
(B) a convex mirror
(C) a plane mirror
(D) both concave as well as plane mirror

B

Question: The path of a ray of light coming from air passing through a rectangular glass slab traced by four students are shown as A, B, C and D in figure. Which one of them is correct?
(A) A
(B) B
(C) C
(D) D

B

Question: When light falls on a smooth polished surface, most of it
(A) is reflected in the same direction
(B) is reflected in different directions
(C) is scattered
(D) is refracted into the second medium

A

Question: In which of the following, the image of an object placed at infinity will be highly diminished and point sized?
(A) Concave mirror only
(B) Convex mirror onl
(C) Convex lens only
(D) Concave mirror, convex mirror, concave lens and convex lens.

D

Question: Image formed by reflection from a plane mirror is
(A) real and inverted
(B) virtual and erect
(C) real and erect
(D) virtual and inverted

B

Question: Magnifying power of a concave lens is
(A) always > 1
(B) always < 1
(C) always = 1
(D) can have any value

B

Question: If an incident ray passes through the focus, the reflected ray will
(A) pass through the pole
(B) be parallel to the principal axis
(C) retrace its path
(D) pass through the centre of curvature

B

Question. Large number of thin stripes of black paint are made on the surface of a convex lens of focal length 20 cm to catch the image of a white horse. The image will be
(A) a zebra of black stripes
(B) a horse of black stripes
(C) a horse of less brightness
(D) a zebra of less brightness

C

(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct.

Question. Assertion : When the object moves with a velocity v→ , its image in the plane mirror moves with a velocity of −2v→ with respect to the object.
Reason : The minimum height of the mirror to be required to see the full image of man of height h is h/2 .

B

Question. Assertion : As the temperature of a medium increases the refractive index decreases.
Reason : When a ray travels from vacuum to a medium, then μ is known as absolute refractive index of the medium. (μvacuum = 1).

B

Question. Assertion : A point object is placed at a distance of 26 cm from a convex mirror of focal length 26 cm. The image will not form at infinity.
Reason : For above given system the equation 1/u + 1/v = 1/f gives v = ∞.

D

Question. Assertion : A virtual image cannot be projected one screen.
Reason : Virtual images are formed by actual meeting of rays of light after reflection or refraction.

C

Question. Assertion : Red light travels faster in glass than green light.
Reason : The refractive index of glass is less for red light than for green light.

A

Question. Assertion : As light travels from one medium to another, the frequency of light does not change.
Reason : Because frequency is the characteristic of source.

A

Question. Assertion : The diameter of convex lens required to form full image of an object is half the height of the object.
Reason : The smaller diameter lens will give full image of lower intensity.