Light and Optics Quiz

What is refraction?

• The dispersion of light rays

• The bending of light rays

• The absorption of light rays

• The reflection of light rays

What is the index of refraction for water?

• 1.33

• 1.00

• 1.52

• 1.47

What type of lens is thinner in the middle?

• Concave lens

• Convex lens

• Bifocal lens

• Cylindrical lens

What is the function of the iris in the eye?

• To control the size of the pupil

• To focus light onto the retina

• To send electrical impulses to the brain

• To detect light and color

What is the function of the lens in the eye?

• To control the size of the pupil

• To send electrical impulses to the brain

• To detect light and color

• To focus light onto the retina

What causes farsightedness?

• Lens made too thin

• Lens made too thick

• Eye shape is too short

• Eye shape is too long

What is the function of the optic nerve in the eye?

• To focus light onto the retina

• To detect light and color

• To control the size of the pupil

• To send electrical impulses to the brain

Optical fibre based on the principle of

• total internal reflection.

• total internal refraction.

• diffraction.

• interference.