A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 15

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The refracting angle of a prism is $A$ and the refractive index of the material of the prism is $\cot \frac{A}{2} .$ The angle of minimum deviation is

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Important Questions on Refraction of Light

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IMPORTANT

A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 16

The angle of a prism is $50 ° .$ A light falls on one of the refracting surfaces of the prism and suffers a minimum deviation of $30 ° .$ The refractive index of the material of the prism is

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 17

The refractive indices of water, glass and air are

1.33, 1.55

and

1.00

respectively. The total internal reflection will not be seen when light comes from

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 18

A beam of monochromatic blue light of wavelength

4200 Å

in air travels in water of refractive index

\frac{4}{3}

. Its wavelength in water will be

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 19

The refractive index of glass is

1.520

for red light and

1.525

for blue light. Let

d_{1}

and

d_{2}

be the angles of minimum deviation for red and blue light respectively in a prism of this glass. Then,

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 20

A ray is incident on an equilateral prism of r.i.

\sqrt{2}

. The ray emerges from the prism with a deviation of

30 ° .

The angle made by the ray inside the prism with the base of the prism is

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 21

Coming from vacuum, a ray of light is incident on a medium of r.i.

μ

such that the angle of incidence is twice the angle of refraction. The angle of incidence is

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12th West Bengal Board

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 22

A ray of light suffers total internal reflection while passing from medium

P

to medium

Q

. Here, the media

P

and

Q

have the following characteristic.

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12th West Bengal Board

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A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 13 - Refraction of Light>EXERCISE 13>Q 23

When a ray of light enters a glass slab from air