How do we see?

1) Which of the following best describes the path of light?

• Curved

• Zigzag

• Straight

• Spiral

2) Which term refers to a single line or path along which light travels?

 

• Stream

• Ray

• Beam

3) Why are ray diagrams used?

• To model how light travels

• To predict the color of light

• To measure the speed of light

Why do ray diagrams have arrows?

 

• To indicate the direction of the light rays

• To measure the brightness of the light

• To represent different colors of light

5) How do we see objects? Describe the path of light from the light source.

• Light is emitted from our eyes and illuminates the object.

• Light travels from the light source, hits the object, and then reflects into our eyes.

• Light directly enters our eyes from the object.