Interference pattern is obtained on a screen due to two identical sources of monochromatics light. The intensity of the central brigh fringe is I when

Question

Interference pattern is obtained on a screen due to two identical sources of monochromatics light. The intensity of the central brigh fringe is I when

Interference pattern is obtained on a screen due to two identical sources of monochromatics light. The intensity of the central brigh fringe is I when one of the two sources is blocked, its intensity becomes `I_(0)`. The intensity in two situations are related as
A. `I=I_(0)`
B. `I= sqrt(2).I_(0)`
C. `I= 2 I_(0)`
D. `I= 4I_(0)`

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - D
`I=I_(1)+I_(2)+sqrt(I_(1)I_(2))= 2 cos (alpha_(1)-alpha_(2))`
For bright fringe, `(alpha_(1)-alpha_(2))=0 and I_(1)=I_(2) =I_(0)`
`:. I=I_(0)+I_(0)+2 sqrt(I_(0)I_(0))=4I_(0)`

4 views Answered 2023-02-05 15:29