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In Young's double slit experiment, an in...

In Young's double slit experiment, an interference pattern is obtained on a screen by a light of wavelength `6000Å`, coming from the coherent sources `S_1` and `S_2`. At certain point P on the screen third dark fringe is formed. Then the path difference `S_1P-S_2P` in microns is

A

`0.75`

B

`1.5`

C

`3.0`

D

`4.5`

Text Solution

Verified by Experts

The correct Answer is:
B
For dark fringe at P,
`S_(1)P-S_(2)P=(5lambda)/2`
`=5xx6000/2=15000 Å=1.5 "micron"`
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