Ray Optics (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 59 - 63 of 105

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Question number: 59

» Ray Optics » Snell's Law

MCQ▾

Question

A ball is dropped from a height of 20 m above the surface of water in a lake. The refractive index of water is Equation . A fish inside the lake, in the line of fall of the ball, is looking at the ball. At an instant, when the ball is 12.8 m above the water surface, the fish sees the speed of ball is, Equation

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 60

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

Assertion-Reason▾

Assertion (Ꭺ)

A rainbow cannot be seen at noon, when the sun is high in the sky.

Reason (Ꭱ)

A rainbow is formed by dispersion of light.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

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

Question number: 61

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

MCQ▾

Question

Calculate the dispersive power for crown glass from the (given data: Equation )

Choices

Choice (4) Response

a.

0.0163

b.

0.0183

c.

0.0112

d.

0.0142

Question number: 62

» Ray Optics » Total Internal Reflection

MCQ▾

Question

Mirages are observed in deserts due to,

Choices

Choice (4) Response

a.

Total internal reflection of light

b.

Interference of light

c.

Dispersion of light

d.

Double refraction of light

Question number: 63

» Ray Optics » Magnification

MCQ▾

Question

A lens is placed between a source of light and a wall. It forms images of area A 1 and A 2 on the wall for its two different positions. The area of the source of light is,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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