Page 16 - 10-phy-12 Geometrical Optics

Post Lab. 1. You are given a hollow prism. Fill it with water and find the angle of
Activities incidence and corresponding angle of refraction. Determine the
refractive index of water.
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Activities
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2. A triangular prism is shown in the figure. 45°

The angles of prism are 90, 45 and 45.

What can you say about the refractive

index of the prism? 45°

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1. Repeat the experiment to take at least six readings. Now plot a graph
between angle of incidence and angle of deviation. Determine the value
of angle of minimum deviation.
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2. Determine the refractive index of the glass prism by using the formula

sin çæ A + D ö÷
n= è 2 ø

sin æç A ö÷
è2ø

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3. Construct a periscope by using two right angled prisms.

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