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In a Fresnel's biprism experiment, D=1.3...

In a Fresnel's biprism experiment, D=1.3 m and d=0.65 mm. if the eyepiece has to be moved through a distance of 1.6 cm for 16 fringes to crss the firled of view, then the wavelength of light used is

A

4000 Å

B

4500 Å

C

5000 Å

D

5500 Å

Text Solution

Verified by Experts

The correct Answer is:
C
Fringe with `X=(1.6)/(16)=1mm=10^(-3)m`
`lamda=(Xd)/(D)=(10^(-3)xx6.5xx10^(-4))/(1.3)=5000` Å
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