Properties of Light

The properties of light help the eye and the camera capture images by:

• allowing light to be focused and form clear images

• scattering light in all directions

• absorbing all light

• blocking light from entering

How does the lens of the eye change to focus on objects?

• It becomes thicker or thinner depending on the distance of the object.

• It changes color.

• It moves up and down.

• It rotates.

What is the goal of the eye's focusing mechanism?

• To change the color of the eye.

• To cause the focal point to fall exactly on the retina.

• To make the eye larger.

• To adjust the brightness of the eye.

Fill in the blank: The eyeball changes in shape to bring the retina closer to or farther away from the _______.

• lens

• cornea

• iris

• pupil

What is the function of the eyeball?

• moves inside the head to look at an object.

• produces tears to keep the eye moist.

• filters light entering the eye.

• transmits visual information to the brain.

What is the function of the pupil?

• gets bigger or smaller to let in more or less light.

• transmits sound to the brain.

• pumps blood throughout the body.

• filters waste from the blood.

What is the function of the iris?

• controls the opening and closing of the pupil.

• transmits visual information to the brain.

• focuses light onto the retina.

• detects color and light intensity.

What is the function of the lens?

• focusses the light onto the retina.

• protects the eye from dust.

• produces tears to lubricate the eye.

• detects color and light intensity.

What is the function of the retina?

• receives the image and sends a message to the brain about the image.

• controls the amount of light entering the eye.

• focuses light onto the retina.

• protects the eye from dust and debris.

Light enters the eye through the:

• cornea

• pupil

• retina

• lens