Light and Eye STUDY GUIDE

What is the role of the cornea in the eye?

• The cornea helps to focus light onto the retina.

• The cornea protects the eye from dust and debris.

• The cornea regulates the amount of light entering the eye.

• The cornea produces tears to keep the eye moist.

What is the fastest medium for light to travel through?

• Water

• Glass

• Empty Space

• Air

What does the Law of Reflection state?

• The angle of incidence is equal to the angle of reflection.

• The angle of incidence is greater than the angle of reflection.

• The angle of incidence is less than the angle of reflection.

• The angle of incidence is perpendicular to the angle of reflection.

What is a shadow?

• A dark area created when an object blocks light.

• A bright spot created by a light source.

• A reflection of an object on a surface.

• A color produced by mixing different pigments.

What is the electromagnetic spectrum?

• The range of all types of electromagnetic radiation, including visible light.

• A type of sound wave that can be heard by humans.

• A measure of the speed of light in a vacuum.

• The visible light spectrum only, excluding infrared and ultraviolet.

What is the speed of light in a vacuum?

• Approximately 299,792 kilometers per second.

• Approximately 150,000 kilometers per second.

• Approximately 300,000 kilometers per second.

• Approximately 1,000,000 kilometers per second.

What is a wave?

• A disturbance that transfers energy from one place to another.

• A type of particle that moves through a medium.

• A fixed point in space that does not change.

• A measure of the frequency of sound.

What is the difference between a convex lens and a concave lens?

• A convex lens diverges light rays, while a concave lens converges them.

• A convex lens converges light rays, while a concave lens diverges them.

• Both lenses converge light rays.

• Both lenses diverge light rays.

What is the function of the lens behind the pupil in the eye?

• Allows us to see objects near and far.

• Protects the eye from dust and debris.

• Regulates the amount of light entering the eye.

• Transmits signals to the brain for processing.

What is an example of a natural light source?

• The sun.

• Light bulb.

• Firefly.

• Neon sign.