Properties of Light

What are the properties of light?

• Light travels in a straight line.

• Light is heavier than air.

• Light can be seen only at night.

• Light is a liquid.

Based on the diagram, why can't Dr. Atom and Zoe see each other over the wall?

• Because light can bend over the wall

• Because light travels in a straight line and cannot bend over or around the wall

• Because the wall is too high

• Because it is dark

Sue and Joe are carrying out a simple experiment to prove that light travels in a straight line. What does the experiment show about the path of light?

• Light can bend around corners

• Light travels in a straight line

• Light can travel in any direction

• Light cannot travel through a hose

Sue and Joe are carrying out a simple experiment to prove that light travels in a straight line. What happens when the hose is curved?

• Joe can see the light from the candle

• Joe cannot see the light from the candle

• The hose glows

• The candle goes out

What happens when the hose is straight?

• Joe can see the light from the candle through the hose.

• The hose becomes invisible.

• The candle goes out.

• Joe hears a loud noise from the hose.

Some animals can give off their own light. Fireflies have chemicals in their body that produce light when they are mixed. What do fireflies use the light for?

• To find food

• To attract mating partners

• To scare away predators

• To see in the dark

Some book covers appear shinier than others because:

• they reflect more light due to their material or finish.

• they are always newer than others.

• they have more colors on them.

• they are larger in size.

Reflectors are designed to reflect light. Bicycles and helmets are fitted with reflectors to help motorists see cyclists in the dark. This helps to prevent accidents and injuries. What is the main purpose of reflectors on bicycles and helmets?

• To make bicycles look attractive

• To help motorists see cyclists in the dark

• To make bicycles heavier

• To keep bicycles clean

Light can be reflected from surfaces. When light bounces off an object, we say that light is ________.

• reflected

• absorbed

• transmitted

• refracted

Which type of surface reflects most light in the same direction?

• Rough surface

• Smooth surface

• Brick wall

• Dull surface