Wave Optics-Polarization (NEET Physics): Questions 1 - 4 of 9

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Question number: 1

» Wave Optics » Polarization

MCQ▾

Question

Which statements are incorrect for a zone plate and a lens?

(1) Zone plate has one focus whereas lens has multiple focal lengths

(2) Both zone plate and lens have multi focal lengths

(3) Zone plate has one focus whereas a lens has infinite

(4) Zone plate has multi focal lengths whereas lens has one

Select the correct answers and mark it according to the following codes:

Codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 2

» Wave Optics » Polarization

Assertion-Reason▾

Assertion (Ꭺ)

A Nicol prism can produce polarised light. It can also analyses plane polarised light.

Reason (Ꭱ)

Nicol prism reduces the intensity of light to zero.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

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: 3

» Wave Optics » Polarization

MCQ▾

Question

Unpolarised light of intensity 32 Wm -2 passes through three polarizers such that the transmission axis of the last polarizer is crossed with the first. If the intensity of the emerging light is 3 Wm -2, at what angle will the transmitted intensity be maximum?

Choices

Choice (4) Response

a.

15°

b.

75°

c.

35°

d.

45°

Question number: 4

» Wave Optics » Polarization

MCQ▾

Question

Two Polaroids are oriented with their planes perpendicular to incident light and transmission axis making an angle of 30 0 with each other. What fraction of incident unpolarised light is transmitted?

Choices

Choice (4) Response

a.

37.5 %

b.

27.5 %

c.

57.5 %

d.

17.5 %

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