Light- Review

What is reflection of light?

• Scattering of light when it passes through a medium

• Bouncing back of light when it strikes a surface

• Refraction of light when it changes direction

• Absorption of light by a surface

Explain how a mirror reflects light.

• Light hits the mirror and gets absorbed by the surface

• Light hits the mirror and bounces off the smooth surface at the same angle.

• The angle of reflection is different from the angle of incidence

• The mirror creates its own light to reflect the image

What is refraction of light?

• The emission of light from a source

• The bending of light as it passes from one medium to another.

• The absorption of light by a medium

• The reflection of light off a surface

What are transparent, translucent, and opaque materials?

• Materials that are magnetic and conduct electricity

• Materials that are only visible in the dark

• Materials that change color in different light

• Materials that allow light to pass through completely, allow some light to pass through, and do not allow light to pass through at all.

Give an example of a transparent material and explain why it is transparent.

• Plastic

• Glass

• Wood

• Metal

What are the colors of the visible spectrum?

• Black, White, Gray

• Pink, Brown, Gold

• Cyan, Magenta, Chartreuse

• Red, Orange, Yellow, Green, Blue, Indigo, Violet

What are sources of light?

• Sun, stars, fire, and light bulbs

• Clouds, wind, and rain

• Plants, animals, and soil

• Moon, water, and rocks

Name two natural sources of light and two artificial sources of light.

• Moon, stars

• Sun, fire, light bulbs, LED lights

• Rocks, plants

• Candles, flashlights

How does the color of an object affect its absorption of light?

• Color has no effect on light absorption.

• All colors absorb light equally.

• Darker colors absorb more light than lighter colors.

• Lighter colors absorb more light than darker colors.

What is the principle behind a prism separating white light into colors?

• Reflection of light

• Absorption of light

• Diffraction of light

• Refraction of light