A ray of light strikes a plane mirror at an angle of incidence 45^@ as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 4^@. The angle through which the mirror should be rotated if the total deviation of the ray is to be 90^@ is :

A ray of light strikes a plane mirror at an angle of incidence 45^@ as

1.	A ray of light strikes a plane mirror at an angle of incidence 45^@ as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 4^@. The angle through which the mirror should be rotated if the total deviation of the ray is to be 90^@ is :
Answer» `1^@` CLOCKWISE `1^@` ANTICLOCKWISE `2^@` clockwise `2^@`anticlockwise Answer :B

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A ray of light strikes a plane mirror at an angle of incidence 45^@ as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 4^@. The angle through which the mirror should be rotated if the total deviation of the ray is to be 90^@ is :

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