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The lateral shift increases as the angle of incidence increases.

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Important Questions on Light- Reflection and Refraction

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Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

In an experiment of measuring the refractive index of a glass slab using travelling microscope in physics lab, a student measures real thickness of the glass slab as

5.25 mm

and apparent thickness of the glass slab at

5.00 mm

. Travelling microscope has

20

divisions in one

cm

on main scale and

50

divisions on Vernier scale is equal to

49

divisions on main scale. The estimated uncertainty in the measurement of refractive index of the slab is

\frac{x}{10} \times 10^{- 3}

, where

x

is ______

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Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

Light of wavelength

λ = 500 nm

in vacuum, travels a distance of

1 cm

in a slab of glass, whose refractive index is

1.5

. How many complete wavelengths of light will be included in this path?

HARD

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

For an object placed at a distance

2.4 m

from a lens, a sharp focused image is observed on a screen placed at a distance

12 cm

from the lens. A glass plate of refractive index

1.5

and thickness

1 cm

is introduced between lens and screen such that the glass plate plane faces parallel to the screen. By what distance should the object be shifted so that a sharp focused image is observed again on the screen?

HARD

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A beam of light consisting of red, green and blue colours is incident on a right-angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths are

1.39

1.44

and

1.47

respectively.

Question Image

The prism will:

HARD

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

The difference in the number of waves when yellow light propagates through air and vacuum columns of the same thickness is one. The thickness of the air column is _____

mm

. [Refractive index of air

= 1.0003

, the wavelength of yellow light in vacuum

= 6000 \overset{\circ}{A}]

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Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A ray of light is incident normally on a glass slab of thickness

5 cm

and refractive index

1.6

. The time taken to travel by a ray from source to surface of the slab is the same as to travel through glass slab. The distance of the source from the surface is

HARD

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

Light travels through a glass slab of thickness $t$ and having refractive index $n$ . If $c$ is the velocity of light in vacuum then the time taken by light to travel this thickness of glass is

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Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A ray of light incident on a transparent sphere at an angle

\frac{π}{4}

and refracted at an angle

r

, emerges from the sphere after suffering one internal reflection. The total angle of deviation of the ray is

EASY

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

Draw a neat diagram to show lateral shift of a ray refracted through a parallel-sided slab. Indicate the lateral shift in the diagram by a
double-headed arrow.

HARD

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A ray of light is incident at a small angle

θ

on a rectangular glass slab of thickness

t

. If the refractive index of the glass slab is

μ

, show that the perpendicular distance between the emergent ray from the slab and the incident ray is

\frac{tθ (μ - 1)}{μ}

MEDIUM

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A green light is incident from the water to the air - water interface at the critical angle

(θ_{c})

. Select the correct statement.

HARD

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

The path of a light ray inside a transparent slab of variable refractive index is $y = 4 x^{2} .$ A light ray travelling in air falls on the surface of the slab at an angle $30 °$ as shown in the figure. The refractive index of the slab at $y = 0.5 m$ is

Question Image

EASY

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A travelling microscope is focused on an ink dot. When a glass slab (

n = 1.5

) of thickness

9 cm

is introduced on the dot, the travelling microscope has to be moved by

EASY

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index

\frac{5}{3}

is poured inside the bucket, then microscope have to be raised by

30 cm

to focus the object again. The height of the liquid in the bucket is :

EASY

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

An air bubble in a glass slab with refractive index

1.5

(near-normal incidence) is

5 cm

deep when viewed from one surface and

3 cm

deep when viewed from the opposite face. The thickness (in

cm

) of the slab is

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Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A diver looking up through the water sees the outside world contained in a circular horizon. The refractive index of water is

\frac{4}{3}

, and the diver's eyes are

15 cm

below the surface of the water. Then the radius of the circle is :

EASY

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A ray of light originates from inside a glass slab and is incident on its inner surface at an angle $θ$ as shown,

Question Image

In this experiment the location $x$ of the spot where they ray hits the screen is recorded. Which of the following correctly shown the plot of variation of $x$ with the angle $θ$ ?

Question Image

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Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

Write the procedure of lab activity to understand lateral shift of light rays through a glass slab.

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Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

Time taken by the sunlight to pass through a slab of

4 cm

and refractive index

1.5

is ______

s

EASY

Science>Physics>Light- Reflection and Refraction>Refraction through Glass Slab

A glass slab of thickness

4 cm

contains the same number of waves as in

x cm

of water column when both are traversed by the same monochromatic light. If the refractive indices of glass and water for that light are

\frac{5}{3}

and

\frac{4}{3}

respectively, the value of

x

will be

The lateral shift increases as the angle of incidence increases.

Important Questions on Light- Reflection and Refraction

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