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The velocities of light in two different...

The velocities of light in two different media are 2*`10^8`m/s and 2.5 * `10^8`m/s respectively.The critical angle for these media is

A

`sin^(-1)(1/5)`

B

`sin^(-1)(4/5)`

C

`sin^(-1)(1/2)`

D

`sin^(-1)(1/4)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-GEOMETRICAL OPTICS-LECTURE SHEET (EXERCISE II LEVEL -I (MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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  2. The refractive indices of glycerine and diamond with respect to air ar...

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  3. A monochromatic light passes through a glass slab (mu = (3)/(2)) of th...

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  7. A unit vector along the incident ray of light is hat(i). The unit vect...

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  8. The velocities of light in two different media are 2*10^8m/s and 2.5 *...

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  9. Light takes t(1) second to travel a distance x cm in vacuum and the sa...

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  11. The refractive index of the core of an optical fibre is mu(2) and that...

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  12. The refractive index of a prism for a monochromatic wave is sqrt(2)and...

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  17. The refractive indices of crown glass prism of C,D and F lines are 1.5...

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