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In fresnel's biprismm experiment, the se...

In fresnel's biprismm experiment, the second dark band is at a distance of 1 mm from the central bright band. If D=1m and d=0.9 mm, then the wavelength of light used is

A

6000 Å

B

7000 Å

C

5000 Å

D

5500 Å

Text Solution

Verified by Experts

The correct Answer is:
A
`3/2 X=1mm" "therefore X=2/3 mm`
`therefore lamda=(Xd)/(D)=2/3xx(10^(-3)xx0.9xx10^(-3))/(1)=6000` Å
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MARVEL PUBLICATION-INTERFERENCE AND DIFFRACTION-TEST YOUR GRASP
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