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The refracting angle of a prism is A and...

The refracting angle of a prism is `A` and refractive index of the material of the prism is `cos(A//2)`. The angle of minimum deviation is

A

`pi-2A`

B

`pi-A`

C

`pi/2-2A`

D

`pi/2-A`

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(a) If the refracting angle of a prism is 60^@ and the minimum deviation is 30^@ , then find the angle of incidence. (b) A ray of light passes through an equilateral prism such that the angle of emergence is equal to the angle of incidence and each is equal to 3//4^(th) of the angle of prism. Find the angle of deviation. (c) The refracting of a prism is A and the refractive index of the material of the prism is cotA//2 . Find the angle of deviation. (d) The angle of a prism is 60^@ . What is the angle of incidence for minimum deviation? The refractive index of the material of the prism is sqrt2 .

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Knowledge Check

  • The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A)/(2) . The angle of minimum deviation is

    A
    `180^(@) - 3A`
    B
    `180^(@)` - 2A
    C
    `90^(@)` - A
    D
    `180^(@)`+2A

  • The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A//2). the angel of minimum deviation is

    A
    `180^(@)-3A`
    B
    `180^(@)-2A`
    C
    `90^(@)-A`
    D
    `180^(@)+2A`

  • The refracting angle of a prism is A and refractive index of the material of prism is cot(A//2) . The angle of minimum deviation will be

    A
    `180^(@)-3A`
    B
    `180^(@)+3A`
    C
    `90^(@)-3A`
    D
    `180^(@)-2A`

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