Ray Optics Class 12 MCQ Students FREE

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Ray Optics Class 12 MCQ. We covered all the Ray Optics Class 12 MCQ in this post for free so that you can practice well for the exam.

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MCQ on Ray Optics for NEET Students

The angle of minimum deviation in an equilateral prism of refractive index 1.414 is

What should be the focal length of the lens to be added to the combination of two lenses each of 2.5 D, such that, the new combination power will have the power of 3.75 D?

The focal length of a lens is independent of ………

Assertion: In optical instruments such as photographic cameras, telescopes, etc. anastigmatic lenses are used. Reason: Anastigmatic lenses are free from most of the optical defects of image formation.

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of the prism. The angle of deviation is

Two thin lenses, when in contact, produce a combination of power + 10 dioptres. When they are 0.25 m apart, the power reduces to +6 dioptre. The focal lengths of the two lenses are (f₁, f2 are focal lengths)

Reema cannot see distinctly the objects placed at a distance of less than one and a half meters. The power of the lens that she should use to read a book at a distance of 30 cm is

Light upon passing through ……… will exhibit dispersion.

A square card of side length 1 mm is being seen through a magnifying lens of focal length 10 cm. The card is placed at a distance of 6 cm from the lens. The apparent area of the card through the lens is

A ray of light is incident at 60° on one face of a prism of prism angle 30° and the emergent ray makes 30° with the incident ray. The refractive index of the prism is

Dispersion of light is not possible if

You are given four sources of light each one providing a light of a single color red, orange, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90°. Which of the following statements is correct if the source of yellow light is replaced with that of other lights without changing the angle of incidence?

A parallel beam of white light falls on a convex lens. Images of blue, yellow, and red light are formed on the other side of the lens at distances of 10 cm, 10.5 cm, and 11.4 cm respectively. The dispersive power of the material of the lens is

The focal lengths of the objective and eye-piece of a telescope are respectively 200 cm and 4 cm. The moon subtends an angle of 0.6° at the eye. If it is looked through the telescope, the angle subtended by the moon’s image will be

Two thin lenses of powers -2 D and 4 D are placed in contact coaxially. The focal length of the combination is

When the prism is placed in a minimum deviation position, the angle made by refracted light to the base of a prism is

Snell’s law of refraction is valid for incident angle

A concave lens forms the image of an object such that the distance between the object and the image is 15 cm and the magnification produced is 1/6. The focal length of the lens will be

Images formed by total internal reflection are very bright because

During the formation of the rainbow, from the sunlight entering the drop of water to emerging out of it number of times, it undergoes reflection refraction is respectively

Choose the incorrect option. A system of two lenses in contact allows

When rays passing through the optical center of le emerge parallel to incident laterally rays but are displaced then the given lens is

The image on the retina is formed because of the path of light rays through ………. ( Ray Optics Class 12 MCQ )

The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 16 cm is placed between the convex lens and the image at a distance of 24 cm from the convex lens, the new size of the image is

A thin glass (refractive index 1.5) lens has an optical power of -10 D in the air. Its optical power in a liquid medium with a refractive index of 1.6 will be

Lenses are constructed using a material with a refractive index of 1.5. If the focal length of the biconvex lens is 24 cm and that of the concavo-convex lens is -120 cm, then the magnitude of radii of curvature of lenses respectively is

The secondary rainbow is fainter than the primary rainbow because ( Ray Optics Class 12 MCQ )

The focal length of the objective and eyepiece of the telescope is 158 cm and 4 cm respectively. What is the length of the telescope for normal adjustment?

MCQ on Ray Optics for NEET Students

The angle of minimum deviation in an equilateral prism of refractive index 1.414 is

(A) 30°

(B) 45°

(D) 90°

Option a – 30°

What should be the focal length of the lens to be added to the combination of two lenses each of 2.5 D, such that, the new combination power will have the power of 3.75 D?

(A) a convex lens of focal length 80 cm

(B) a concave lens of focal length 80 cm

(D) a concave lens of focal length 45 cm

Option b – a concave lens of focal length 80 cm

The focal length of a lens is independent of ………

(A) the refractive index of lens material

(B) radii of curvature of the lens

(D) none of the above

Option c – object distance

Assertion: In optical instruments such as photographic cameras, telescopes, etc. anastigmatic lenses are used. Reason: Anastigmatic lenses are free from most of the optical defects of image formation.

(A) The assertion is True, Reason is True; Reason is a correct explanation for Assertion.

(B) The assertion is True, and Reason is True; Reason is not a correct explanation for Assertion.

(D) The assertion is False, Reason is True.

Option a – The assertion is True, Reason is True; Reason is a correct explanation for Assertion.

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of the prism. The angle of deviation is

(A) 45°

(B) 39°

(D) 30°

Option d – 30°

Two thin lenses, when in contact, produce a combination of power + 10 dioptres. When they are 0.25 m apart, the power reduces to +6 dioptre. The focal lengths of the two lenses are (f₁, f2 are focal lengths)

(A) f₁ = 0.1 m, f₂ = 0.5 m

(B) f₁ = 0.125 m, f₂ = 0.2 m

(D) f₁ = 0.1 m, f₂ = 0.2 m

Option c – f₁ = 0.125 m, f₂ = 0.5 m

Reema cannot see distinctly the objects placed at a distance of less than one and a half meters. The power of the lens that she should use to read a book at a distance of 30 cm is

(A) + 3.0 D

(B) + 0.125 D

(D) +2.67 D

Option d – +2.67 D

Light upon passing through ……… will exhibit dispersion.

(A) the solid rectangular glass slab

(B) solid ice prism

(D) hollow glass prism

Option b – solid ice prism

A square card of side length 1 mm is being seen through a magnifying lens of focal length 10 cm. The card is placed at a distance of 6 cm from the lens. The apparent area of the card through the lens is

(A) 4 mm²

(B) 6.25 mm²

(D) 16 mm²

Option b – 6.25 mm²

A ray of light is incident at 60° on one face of a prism of prism angle 30° and the emergent ray makes 30° with the incident ray. The refractive index of the prism is

(A) 1.732

(B) 1.5

(D) 1.33

Option a – 1.732

Dispersion of light is not possible if

(A) the refractive index of all materials is one.

(B) all colors of light travel with speed ‘c’ always.

(D) Neither (A) nor (B).

Option c – (A) and (B)

You are given four sources of light each one providing a light of a single color red, orange, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90°. Which of the following statements is correct if the source of yellow light is replaced with that of other lights without changing the angle of incidence?

(A) The beam of red light would undergo total internal reflection.

(B) The beam of red light would bend towards normal while it gets refracted through the second medium.

(D) The beam of green light would bend away from the normal as it gets refracted through the second medium.

Option c – The beam of green light would undergo total internal reflection

A parallel beam of white light falls on a convex lens. Images of blue, yellow, and red light are formed on the other side of the lens at distances of 10 cm, 10.5 cm, and 11.4 cm respectively. The dispersive power of the material of the lens is

(A) 0.0671

(B) 0.0846

(D) 0.169

Option c – 0.129

The focal lengths of the objective and eye-piece of a telescope are respectively 200 cm and 4 cm. The moon subtends an angle of 0.6° at the eye. If it is looked through the telescope, the angle subtended by the moon’s image will be

(A) 100°

(B) 50°

(D) 30⁰

Option d – 30⁰

Two thin lenses of powers -2 D and 4 D are placed in contact coaxially. The focal length of the combination is

(A) 50 cm

(B) 62.7 cm

(D) 82.9 cm

Option a – 50 cm

When the prism is placed in a minimum deviation position, the angle made by refracted light to the base of a prism is

(A) 0°

(B) 30°

(D) 45°

Option a – 0°

Snell’s law of refraction is valid for incident angle

(A) larger than the critical angle.

(B) smaller than the critical angle.

(D) larger than or equal to the critical angle.

Option c – smaller than or equal to the critical angle.

A concave lens forms the image of an object such that the distance between the object and the image is 15 cm and the magnification produced is 1/6. The focal length of the lens will be

(A) – 6.2 cm

(B) – 4 cm

(D) – 10 cm

Option b – – 4 cm

Images formed by total internal reflection are very bright because

(A) they are virtual with unit magnification.

(B) they are real with unit magnification.

(D) light is refracted into a denser medium.

Option c – entire of light energy is reflected back into the same medium

During the formation of the rainbow, from the sunlight entering the drop of water to emerging out of it number of times, it undergoes reflection refraction is respectively

(A) 1,1

(B) 2,2

(D) 2,1

Option c – 1,2

Choose the incorrect option. A system of two lenses in contact allows

(A) greater magnification.

(B) decreased field of view.

(D) sharper image.

Option b – decreased field of view.

When rays passing through the optical center of le emerge parallel to incident laterally rays but are displaced then the given lens is

(A) biconcave

(B) biconvex

(D) thick

Option d – thick

The image on the retina is formed because of the path of light rays through ………. ( Ray Optics Class 12 MCQ )

(A) 2 different refractive indices

(B) 3 different refractive indices

(D) 5 different refractive indices

Option d – 5 different refractive indices

The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 16 cm is placed between the convex lens and the image at a distance of 24 cm from the convex lens, the new size of the image is

(A) 1.25 cm

(B) 2.5 cm

(D) 3.2 cm

Option d – 3.2 cm

A thin glass (refractive index 1.5) lens has an optical power of -10 D in the air. Its optical power in a liquid medium with a refractive index of 1.6 will be

(A) 1.25 D

(B) -1.25 D

(D) -25 D

Option a – 1.25 D

Lenses are constructed using a material with a refractive index of 1.5. If the focal length of the biconvex lens is 24 cm and that of the concavo-convex lens is -120 cm, then the magnitude of radii of curvature of lenses respectively is

(A) 10,20

(B) 20, 10

(D) 30, 20

Option c – 20,30

The secondary rainbow is fainter than the primary rainbow because ( Ray Optics Class 12 MCQ )

(A) it is formed after the internal reflection of the primary rainbow.

(B) it is formed when the sun is lower on the horizon.

(D) all of the above.

Option c – light is totally reflected twice causing more absorption of light.

The focal length of the objective and eyepiece of the telescope is 158 cm and 4 cm respectively. What is the length of the telescope for normal adjustment?

(A) 154 cm

(B) 162 cm

(D) 81 cm

Option b – 162 cm

We covered all the ray optics class 12 MCQ above in this post for free so that you can practice well for the exam.

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MCQ on Ray Optics for NEET Students

The angle of minimum deviation in an equilateral prism of refractive index 1.414 is

What should be the focal length of the lens to be added to the combination of two lenses each of 2.5 D, such that, the new combination power will have the power of 3.75 D?

The focal length of a lens is independent of ………

Assertion: In optical instruments such as photographic cameras, telescopes, etc. anastigmatic lenses are used. Reason: Anastigmatic lenses are free from most of the optical defects of image formation.

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of the prism. The angle of deviation is

Two thin lenses, when in contact, produce a combination of power + 10 dioptres. When they are 0.25 m apart, the power reduces to +6 dioptre. The focal lengths of the two lenses are (f₁, f2 are focal lengths)

Reema cannot see distinctly the objects placed at a distance of less than one and a half meters. The power of the lens that she should use to read a book at a distance of 30 cm is

Light upon passing through ……… will exhibit dispersion.

A square card of side length 1 mm is being seen through a magnifying lens of focal length 10 cm. The card is placed at a distance of 6 cm from the lens. The apparent area of the card through the lens is

A ray of light is incident at 60° on one face of a prism of prism angle 30° and the emergent ray makes 30° with the incident ray. The refractive index of the prism is

Dispersion of light is not possible if

A parallel beam of white light falls on a convex lens. Images of blue, yellow, and red light are formed on the other side of the lens at distances of 10 cm, 10.5 cm, and 11.4 cm respectively. The dispersive power of the material of the lens is

The focal lengths of the objective and eye-piece of a telescope are respectively 200 cm and 4 cm. The moon subtends an angle of 0.6° at the eye. If it is looked through the telescope, the angle subtended by the moon’s image will be

Two thin lenses of powers -2 D and 4 D are placed in contact coaxially. The focal length of the combination is

When the prism is placed in a minimum deviation position, the angle made by refracted light to the base of a prism is

Snell’s law of refraction is valid for incident angle

A concave lens forms the image of an object such that the distance between the object and the image is 15 cm and the magnification produced is 1/6. The focal length of the lens will be

Images formed by total internal reflection are very bright because

During the formation of the rainbow, from the sunlight entering the drop of water to emerging out of it number of times, it undergoes reflection refraction is respectively

Choose the incorrect option. A system of two lenses in contact allows

When rays passing through the optical center of le emerge parallel to incident laterally rays but are displaced then the given lens is

The image on the retina is formed because of the path of light rays through ………. ( Ray Optics Class 12 MCQ )

The size of the image of an object, which is at infinity, as formed by a convex lens of focal length 30 cm is 2 cm. If a concave lens of focal length 16 cm is placed between the convex lens and the image at a distance of 24 cm from the convex lens, the new size of the image is

A thin glass (refractive index 1.5) lens has an optical power of -10 D in the air. Its optical power in a liquid medium with a refractive index of 1.6 will be

Lenses are constructed using a material with a refractive index of 1.5. If the focal length of the biconvex lens is 24 cm and that of the concavo-convex lens is -120 cm, then the magnitude of radii of curvature of lenses respectively is

The secondary rainbow is fainter than the primary rainbow because ( Ray Optics Class 12 MCQ )

The focal length of the objective and eyepiece of the telescope is 158 cm and 4 cm respectively. What is the length of the telescope for normal adjustment?

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