Wave Optics (BITSAT Physics): Questions 1 - 6 of 14

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Question number: 1

» Wave Optics » Polarization

MCQ▾

Question

If we consider electrons and photons of the same wavelength, then they will have same –

Choices

Choice (4) Response

a.

Velocity

b.

Energy

c.

Momentum

d.

Angular momentum

Question number: 2

» Wave Optics » Polaroid

MCQ▾

Question

The original temperature of a black body is 2700C. The temperature to which that black body must be raised so as to double the total radiant energy, is –

Choices

Choice (4) Response

a.

9170C

b.

2000K

c.

11900C

d.

14540C

Question number: 3

» Wave Optics » Wavefront

MCQ▾

Question

A wave frequency 500Hz has a velocity of 350ms . The distance between two nearest points, if the wave is 60° out of phase, will be approximately –

Choices

Choice (4) Response

a.

70cm

b.

12.0cm

c.

0.7m

d.

120.0cm

Question number: 4

» Wave Optics » Polarization

MCQ▾

Question

If the momentum of a particle is double, then its de-Broglie wavelength will become

Choices

Choice (4) Response

a.

Half times

b.

Four times

c.

Remain unchanged

d.

Two times

Question number: 5

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

Light of wave length 5000 falls on a sensitive plate with photoelectric work function of 1.9eV . The maximum kinetic energy of the photoelectron emitted will be –

Choices

Choice (4) Response

a.

1.16eV

b.

2.98eV

c.

2.38eV

d.

0.58eV

Question number: 6

» Wave Optics » Polaroid

MCQ▾

Question

A black body radiates heat energy at the rate of 2×105Joule/sec/m2 at a temperature of 127oC . The temperature of the black body, at which the rate of heat radiation in 32×105Joule/sec/m2 is

Choices

Choice (4) Response

a.

927oC

b.

873oC

c.

273oC

d.

527oC

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