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Class 12
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Physics
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Ray Optics and Optical Instruments
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Prism
Prism
Revise with Concepts
Refraction Through Prism
Example
Definitions
Formulaes
>
Deviation Produced by a Triangular Prism
Example
Definitions
Formulaes
>
Relation Between Angle of Prism and Angle of Deviation, Refractive Index of Materials
Example
Definitions
Formulaes
>
Minimum Deviation in a Triangular Prism
Example
Definitions
Formulaes
>
Deviation in Reflection, Refraction and Prism
Example
Definitions
Formulaes
>
Problems on Tir in Prism
Example
Definitions
Formulaes
>
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Learn with Videos
Introduction to Prism
5 mins
Refraction Of Light Through A Prism
5 mins
Factors Affecting Angle of Deviation
7 mins
Prism formula and Related Terms
15 mins
Deviation through Thin Prism
7 mins
Quick Summary With Stories
Refraction of Light Through Prism
2 mins
Prism formula and Related Terms
3 mins
Factors Affecting Angle of Deviation
3 mins
Deviation Produced by a Triangular Prism
3 mins
Dispersion of Light by Prism
3 mins
Refraction of Light Through a Prism
2 mins
Deviation in Reflection, Refraction and Prism
3 mins
Problems on TIR in Prism
3 mins
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Important Questions
Derive the expression for refractive index of the material of the prism in terms of angle of the prism and angle of minimum deviation.
Medium
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>
A ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and each of these equal to
3
/
4
of the angle of the prism. The angle of deviation is
Medium
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>
The refracting angle of a prism is A and the refractive index of the material of the prism is
cot
2
A
. The angle of minimum deviation of the prism is
Medium
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>
A prism of refractive index
2
has refracting angle
6
0
0
. In order that a ray suffers minimum deviation it should be incident at an angle:
Medium
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>
If the critical angle for total internal reflection from a medium to vacuum is
3
0
o
. Then velocity of light in the medium is:
Medium
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>
A ray is incident at an angle of incidence on one surface of a prism of small angle
A
and emerges normally from the opposite surface. If the refractive index of the material of the prism is
μ
, the angle of incidence
i
is nearly equal to :
Medium
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>
For a glass prism
(
μ
=
3
)
the angle of minimum deviation is equal to the angle of the prism. The angle of the prism is
Medium
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>
A ray of light is incident normally on one of the faces of a prism of apex angle
3
0
o
and refractive index
2
. The angle of deviation of the ray is
Medium
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>
A ray of light is incident at an angle of 60
∘
on one of the faces of a prism which has an angle of 30
∘
. The ray emerging out of prism makes an angle of 30
∘
with the incident ray. The refractive index of material is
Medium
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>
Draw a graph to show the variation of the angle of deviation
(
δ
)
with that the angle of incidence (i) for a monochromatic ray of light passing through a glass prism of refracting angle 'A' then deduce the relation:
μ
=
s
i
n
2
A
s
i
n
(
2
A
+
S
m
)
Medium
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>