Question
The ratio of intensities at two points P and Q on the screen in a Young's double slit experiment where phase difference between two wave of same amplitude are 3 and 2 , respectively are
BITSAT
Physics
Wave Optics
2023
BITSAT 2023 (Memory Based Paper 1)
BITSAT Physics Question (2023) — Solution
Options
- A. 1: 3
- B. 3: 1
- C. 3: 2
- D. 2: 3
Answer
C. 3: 2
Step-by-step solution
Intensity at a point in Young's double slit experiment is given by I = I _1+ I _2+2 I _1 I _2 Here I _1= I _2= I _0 (say) At P I _ p = I _0+ I _0+2 I _0 3 =2 I _0+2 I _0 1 2 =3 I _0 At Q I _ Q = I _0+ I _0+2 I _0 90^ =2 I _0 I _ P I _ Q = 3 2
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