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Unit 14: Optics

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1

Optical fibers work on the principle of:

2

The part of the eye that controls the amount of light entering is:

3

Which formula relates focal length, image distance, and object distance of a lens?

4

Which material is commonly used to make acoustic lenses?

5

Gravitational lensing provides evidence for:

6

The bending of light around sharp edges is called:

7

The image formed on the retina of the human eye is:

8

The minimum angle of incidence for which total internal reflection occurs is called:

9

Which type of mirror always forms a virtual, erect, and diminished image?

10

Snell’s law relates the angles of incidence and refraction with:

11

Which mirror is used as a rear-view mirror in vehicles?

12

Rods in the human eye are sensitive to:

13

In a convex lens, parallel rays of light after refraction meet at:

14

Total internal reflection occurs when light travels from:

15

The refractive index of a medium depends upon:

16

Which color deviates the most when passing through a prism?

17

Hypermetropia is corrected using:

18

Which optical device uses total internal reflection to change the direction of light?

19

Which lens is thicker at the center than at the edges?

20

The unit of focal length is:

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