SN Kansagra School
10PhyWS02 Refraction of Light at a plane surface- 2
1. Name and state the principle applied to the given figure, also state the necessary
expression to verify the principle.
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2. Sketch the lateral displacement in the given
figure
Answer the following based on the above concept.
(a) What is lateral displacement?
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(b) Lateral displacement depends on:
(i)
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(ii) _______________________________________________
(iii) _______________________________________________
3. If refraction increases does that necessarily mean that angle of refraction has
increased?
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4. A glass slab is placed over a piece of paper on which VIBGYOR is printed with each
latter into its corresponding colours.
(a) The letter ______________ raised maximum.
(b) the letter ______________ raised minimum.
Reason to satisfy the above answer is ______________________________________
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5. The speed of light in air is 3 X 108 m/s. Calculate the speed of light in glass. The
refractive index of glass is 1.5
6. The speed of light in diamond is 1.25 X 108 m/s. what is its refractive index? (speed of
light in air = 3 X 108 m/s)
7. A ray of light of wavelength 5400 A0 suffers refraction from air to glass. Taking
refractive index of glass = 3/2, find the wavelength of light in glass.
8. Refractive index of water w.r.t. air is 4/3 while that of glass is 3/2. Find refractive
index of glass w.r.t. water.
9. Calculate the speed of light in water when refractive index of water is 4/3 and speed of
light in vacuum is 3 X 108m/s
10.Orange light of wavelength 6600 A0 travelling in air get refracted in water. If the
speed of light in air is 3 X 108m/s and refractive index of water is 4/3 find: (i) the
frequency of light in air, (ii) the speed of light in water and (iii) the wavelength of
light in water.