Interference fringes are observed with a biprism of refracting angle 1° and refractive index 1.5 on a screen 100 cm away form it. The wavelength of light used is 5890 Å. If the distance between the source and the biprism is 20 cm, the fringe width is:

Interference fringes are observed with a biprism of refracting angle 1

1.	Interference fringes are observed with a biprism of refracting angle 1° and refractive index 1.5 on a screen 100 cm away form it. The wavelength of light used is 5890 Å. If the distance between the source and the biprism is 20 cm, the fringe width is:
A.	0.680 mm
B.	0.101 mm
C.	0.508 mm
D.	0.202 mm
Answer» E.

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Interference fringes are observed with a biprism of refracting angle 1° and refractive index 1.5 on a screen 100 cm away form it. The wavelength of light used is 5890 Å. If the distance between the source and the biprism is 20 cm, the fringe width is:

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