Interference fringes are observed with a biprism of refracting angle 2° and refractive index 1.5 on a screen 100 cm away from it. If the distance between the source and the biprism is 20 cm and the fringe width is 0.10 mm, the wavelength of light used is:

Interference fringes are observed with a biprism of refracting angle 2

1.	Interference fringes are observed with a biprism of refracting angle 2° and refractive index 1.5 on a screen 100 cm away from it. If the distance between the source and the biprism is 20 cm and the fringe width is 0.10 mm, the wavelength of light used is:
A.	5710 Å
B.	5900 Å
C.	5630 Å
D.	5820 Å
Answer» E.

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Interference fringes are observed with a biprism of refracting angle 2° and refractive index 1.5 on a screen 100 cm away from it. If the distance between the source and the biprism is 20 cm and the fringe width is 0.10 mm, the wavelength of light used is:

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