Maths-

General

Easy

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Hint:

### In this question firstly we will solve the trigonometric equation and after eliminating the tan part. Then we will use the L'hospital theorem twice and later evaluate and put the value.

## The correct answer is:

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### A ray of light is incident on an equilateral glass prism placed on a horizontal table For minimum deviation which of the following is true?

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### Two identical thin isosceles prisms of refracting angle ‘A’ and refractive index m are placed with their bases touching each other Two parallel rays of light are incident on this system as shown The distance of the point where the rays converge from the prism is

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### A ray of light strikes a plane mirror at an angle of incidence 45^{0} as shown in the figure After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 4^{0} The angle through which the mirror should be rotated if the total deviation of the ray is to be 90^{0} is

### A ray of light strikes a plane mirror at an angle of incidence 45^{0} as shown in the figure After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 4^{0} The angle through which the mirror should be rotated if the total deviation of the ray is to be 90^{0} is

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