Biprism experiment is performed by using light of wavelength of 5000 Å. The distance between the virtual sources is 0.2 mm annd the micrometer eyepiece is at a distance of 100 cm from the slits. What is the distance between the consecutive bright and dark bands?

Options

A. 1.25 mm
B. 2.5 mm
C. 3.5 mm
D. 0.25 mm

Answer

B

Explanation

`lamda=5xx10^(-7)m,D=1m,d=0.2mm=2xx10^(-4)m`
`because X=(lamdaD)/(d)=(5xx10^(-7)xx1)/(2xx10^(-4))=2.5xx10^(-3)m`
`therefore X=2.5mm`