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A single slit of width 0.20 mm is illumi...

A single slit of width `0.20 mm` is illuminated with light of wavelength `500 nm`. The observing screen is placed `80 cm` from the slit. The width of the central bright fringe will be

A

`1 mm`

B

`2 mm`

C

`4 mm`

D

`5 mm`

Text Solution

Verified by Experts

The correct Answer is:
C
Width of central bright fringe`=(2Dlambda)/a`
`=(2xx0.8xx500xx10^(-9))/(0.2xx10^(-3))=4xx10^(-3) m=4 mm`
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CP SINGH-WAVE NATURE OF LIGHT-EXERCISES
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  11. Which of the following cannot be polarised?

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