Ray Optics-Deviation and Dispersion of Light by a Prism (NEET Physics): Questions 15 - 16 of 16

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Question number: 15

» Ray Optics » Deviation and Dispersion of Light by a Prism

Assertion-Reason▾

Assertion (Ꭺ)

There is no dispersion of light refracted through a rectangular glass slab.

Reason (Ꭱ)

Dispersion of light is the phenomenon of splitting of a beam of white light into its constituent colors.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 16

» Ray Optics » Deviation and Dispersion of Light by a Prism

MCQ▾

Question

The dispersive powers of crown and flint glasses are 0.03 and 0.05 respectively. The refractive indices for yellow light for these glasses are 1.517 and 1.621 respectively. It is desired to form an achromatic combination of prisms of crown and flint glasses which can produce a deviation of 1° in the yellow ray. The refracting angle of the flint glass prism is,

Choices

Choice (4) Response

a.

3.4°

b.

2.4°

c.

1.4°

d.

5.2°

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