Electromagnetic Theory-Interference (GATE Physics): Questions 1 - 3 of 3

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Question number: 1

» Electromagnetic Theory » Interference

Appeared in Year: 2016

Short Answer Question▾

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In a Young’s double slit experiment using light, the apparatus has two slits of unequal widths. When only slit – 1 is open, the maximum observed intensity on the screen is 4I0 . When only slit – 2 is open, the maximum observed intensity is I0 . When both the slits are open, an interference pattern appears on the screen. The ratio of the intensity of the principal maximum to that of the nearest minimum is _ .

Question number: 2

» Electromagnetic Theory » Interference

Appeared in Year: 2014

MCQ▾

Question

In an interference pattern formed by two coherent sources, the maximum and the minimum of the intensities are 9I0 and I0 , respectively. The intensities of the individual waves are –

Choices

Choice (4) Response

a.

5I0and4I0

b.

3I0andI0

c.

9I0andI0

d.

4I0andI0

Question number: 3

» Electromagnetic Theory » Interference

Appeared in Year: 2013

MCQ▾

Question

Interference fringes are seen at an observation plane z=0 , by the superposition of two plane waves A1exp[i(k1rωt)] and A2exp[i(k2rωt)] , where A1 and A2 are real amplitudes. The condition for interference maximum is –

Choices

Choice (4) Response

a.

(k1k2)r=(2m+1)π

b.

(k1+k2)r=2mπ

c.

(k1+k2)r=(2m+1)π

d.

(k1k2)r=2mπ

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