Physical Science (Light) - Test Revision

Light is a type of ________________ that travels in ______________ and lets us see things.

• matter; circles

• energy; waves

• sound; ripples

• heat; rays

There are two main sources of light. What are they?

• Electric and solar

• Bright and dim

• Natural and artificial

• Warm and cool

What is the difference between natural and artificial light?

• Natural light comes from nature like the Sun; artificial light is made by humans like lamps.

• Natural light is made by humans; artificial light comes from nature.

• Natural light only works during the night; artificial light only works during the day.

• Natural light is always brighter than artificial light.

When light reflects, it will:

• Disappear completely

• Change into sound

• Get stuck inside the object

• Bounce off a surface

When light is absorbed, it will:

• Pass straight through

• Be taken in by the object and turned into heat

• Bounce back into space

• Change into a shadow

When light transmits, it will:

• Get blocked by the object

• Bounce off the object

• Be taken in and turned into colour

• Pass through the object

A transparent object will allow

• No light to pass through

• All light to pass through clearly

• Only coloured light to pass through

• Light to bounce off its surface only

A translucent object will allow

• Some light to pass through, but it will be scattered

• All light to pass through clearly

• No light to pass through at all

• Light to reflect completely off the surface

An opaque object will allow:

• All light to pass through

• Only a small amount of light to pass through

• Light to pass through clearly but change colour

• No light to pass through at all

What does the Law of Reflection state?

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

• Light always bends when it hits a surface.

• Light disappears when it reflects.

• Reflection only happens with mirrors.