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BITSAT Physics Wave Optics 2023 BITSAT 2023 (Memory Based Paper 1)

BITSAT Physics Question (2023) — Solution

Question

In a Young's double slit experiment, the intensities at two points, for the path difference 4 and 3 ( being the wavelength of light used) are I_1 and I_2 respectively. If I_0 denotes the intensity produced by each one of the individual slits, then I _1+ I _2 I _0 =

Options

  1. A. 3
  2. B. 5
  3. C. 7
  4. D. 10

Answer

A. 3

Step-by-step solution

Resultant intensity in Young's double slit experiment I =4 I _0 ^2 ( 2 ) For path difference 4 phase difference, = 2 4 = 4 I _1=4 I _0 ^2 ( 4 )=2 I _0 For path difference 3 I_2=4 I_0 ^2 ( 2 3 )=I_0 I _1+ I _2 I _0 =3

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