ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 7

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12th ICSE

IMPORTANT

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Calculate the critical angle for glass and water pair. Given refractive index of glass is $1.62$ and that of water is $1.33$ .

Important Questions on Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre

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12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 8

A microscope is focussed on a dot at the bottom of a beaker. Oil is poured into the beaker to a height of

y cm

. Now, the microscope is to be raised through a vertical distance of

x cm

to bring the dot again into focus. Express refractive index of oil in terms of

x

and

y

.

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IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 9

Does critical angle depend upon the colour (wavelength) of light used?

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IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 10

Is critical angle for a given interface greater for red light or for blue light?

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IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 11

What is the critical angle for a material of refractive index

\sqrt{2}

relative to air?

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IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 12

Will the critical angle for glass-water interface smaller or larger than that for glass-air interface?

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IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 13

What is the refractive index of diamond? What is the critical angle for the diamond-air interface?

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12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 14

Which has a larger critical angle, water or diamond?

MEDIUM

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IMPORTANT

ISC Physics Class 12, Part-2>Chapter 2 - Refraction of Light at a Plane Interface : Total Internal Reflection : Optical Fibre>QUESTIONS>Q 15

Name the phenomenon responsible for mirage.