Lenses and the Eye

What part of the eye controls how much light enters the black hole (pupil) in the center of the eye?

• optic nerve
• pupil
• cornea
• iris

What part of the eye acts like a convex lens?

• pupil
• retina
• cornea
• eyelid

For clear vision, an image must be focused exactly on the ________________.

• retina
• pupil
• optic nerve
• lens

A ___ lens makes objects appear bigger.

• concave
• convex
• prism
• flat

A __ lens makes objects appear smaller and further away.

• convex
• concave
• prism
• flat

What type of lens is wider in the middle than on the edges?

• Concave

• Convex

• Objective

• Ocular

What type of lens is thinner in the middle than at the edges?

• Convex

• Concave

• Objective

• Magnifying

When light passes through a convex lens, it_________.

• Diverges, or spreads apart

• Converges, or comes together

• Reflects, or bounces off

• Creates a rainbow

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

The point at which light rays converge after passing through a convex lens is called __________.

• The Horizon Point

• The Point Break

• The Focal Point

• The Perspective

Tags

NGSS.HS-PS4-3

What type of lens do you have in your eye?

• Concave

• Prismatic

• Objective

• Convex