Optics and Lenses Quiz

What is the main difference between convex and concave lenses?

• Convex lenses spread light, while concave lenses focus light.

• Convex lenses focus light, while concave lenses spread light.

• Both convex and concave lenses spread light.

• Both convex and concave lenses focus light.

Which optical tool is used to magnify small objects?

• Magnifying glass

• Camera

• Rearview mirror

• Prism

What is the main function of a lens in an optical device?

• To reflect light

• To absorb light

• To refract light

• To change the color of light

Which type of lens is used in glasses to correct nearsightedness?

• Concave lens

• Convex lens

• Cylindrical lens

• Prism lens

Which part of an optical instrument helps to produce a clearer image?

• Lens

• Mirror

• Light

• Shadow

Which part of the eye controls the amount of light entering it?

• Retina

• Lens

• Pupil

• Cornea

Why is it difficult to see in the dark?

• The eye can only detect bright colors.

• The pupil shrinks and cannot capture enough light.

• Rod cells in the retina are less sensitive to low light.

• The cornea absorbs all incoming light.

Which part of the eye detects light and sends signals to the brain?

• Iris

• Retina

• Cornea

• Pupil

What happens when the lens of the eye loses elasticity with age?

• The eye cannot distinguish colors.

• The eye cannot see in the dark.

• The eye has difficulty focusing on nearby objects.

• The eye becomes more sensitive to bright light.

What is the main function of cone cells in the retina?

• Detecting dim light

• Detecting colors

• Focusing light

• Controlling the amount of light entering the eye