Ray Optics

Practice Questions:

Question 11: easy

Two convex lens of focal length 20 cm and 25 cm are placed in contact with each other, then power of this combination is

1. + 1 D

2. + 9 D

3. - 1 D

4. - 9 D

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Question 12: easy

The angle of minimum deviation for a prism is 40° and the angle of the prism is 60°. The angle of incidence in the position will be

1. 30°

2. 60°

3. 50°

4. 100°

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