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A parallel beam of light is incident on ...

A parallel beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index 2.0 as shown in figure. The position of the image formed by refraction at the first surface is :

A

R/2

B

R

C

2 R

D

3R

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Knowledge Check

  • A parallel narrow beam of light is incident on the surface of a transparent hemisphere of radius R and refractive index mu=1.5 as shown. The position of the image formed by refraction at the image formed by refraction at the spherical surface only as

    A
    `R/2`
    B
    `3R`
    C
    `R/3`
    D
    `2R`

  • A parallel beam of light is incident normally on the flat surface of a hemisphere of radius 6 cm and refractive index 1.5 , placed in air as shown in figure (i). Assume paraxial ray approxiamtion. .

    A
    The rays are focused at `12 cm` from the point `P` to the right, in the solutation as shown in figure (i)
    B
    The rays are focused at `16 cm` from the point `P` to the right, in the situation as shown in figure (i).
    C
    If the rays are incident at the curved surface (figure (ii)) then these are focused at distance `18 cm` from point `P` to the right
    D
    If the ray are incident at the curved surface (figure(ii)) then these are focused at distance `14 cm` from point `P` to the right.

  • A ray of light is incident on the surface of plate of glass of refractive index 1.5 at the polarising angle. The angle of refraction of the ray will be

    A
    `33.7^(@)`
    B
    `23.7^(@)`
    C
    `43.7^(@)`
    D
    `53.7^(@)`

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