Wave Optics (NEET Physics): Questions 10 - 13 of 63

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Question number: 10

» 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: 11

» Wave Optics » Interference

MCQ▾

Question

The equation of two light waves are y1=6cosωt , y2=8cos(ωt+Φ) . The ratio of maximum to minimum intensities produced by the superposition of these waves will be

Choices

Choice (4) Response
a.

1: 7

b.

49: 1

c.

7: 1

d.

1: 49

Question number: 12

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

MCQ▾

Question

Two spectral line of sodium D 1 & D 2 have wavelengths of approximately 5890 Å and 5896 Å. A sodium lamp sends incident plane wave on to a slit of width 2 micrometer. A screen is located at 2 m from the slit. Find the spacing between the first maxima of two sodium lines as measured on the screen.

Choices

Choice (4) Response
a.

9 × 10 4 m

b.

10 -4 m

c.

9 × 10 -4

d. All of the above

Question number: 13

» Wave Optics » Brewster's Law

MCQ▾

Question

When light of a certain wavelength is incident on a plane surface of a material at a glancing angle 30°, the reflected light is found to be completely plane polarized. Determine refractive index of given material –

Choices

Choice (4) Response
a.

3

b.

2

c.

12

d.

2

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