1. A lens with focal length 0.5 m has power:
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Unit 14: Optics
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2. The angle between the incident ray and the normal is called:
3. The part of the eye that controls the amount of light entering is:
4. Which law of reflection states that the angle of incidence is equal to the angle of reflection?
5. Which lens is used to correct myopia (short-sightedness)?
6. Color blindness is mainly due to defect in:
7. Which lens is thicker at the center than at the edges?
8. Which material is commonly used to make acoustic lenses?
9. The minimum angle of incidence for which total internal reflection occurs is called:
10. Which instrument uses lenses to view very small objects?