Light

Which of these statements is true?

• Light travels in straight lines.

• Light is stopped when it meets a solid object.

• Light does not travel in straight lines.

• Light will only travel for about 2000km before it stops.

Which of these is not a source of light?

• a light bulb

• the Sun

• a mirror

• a TV

Shadows are formed because:

• light will only travel a certain distance before it stops.

• a substance called ‘darkness’ collects behind some objects.

• some objects do not give out light in all directions.

• light cannot go through some objects.

Which statement is true?

• Sound travels faster than light.

• Sound will not travel. Only light can travel.

• Light travels faster than sound.

• Light and sound travel at the same speed.

Objects that light can easily pass through are said to be:

• transparent.

• apparent.

• opaque.

• oblong.

Which phrase best completes the following sentence? We see things because:

• they are luminous.

• the Sun shines on them.

• light from them enters our eyes.

• light from our eyes shines on them.

Opaque objects can:

• transmit and reflect light.

• transmit and absorb light.

• reflect and absorb light.

• only reflect light.

Which of these diagrams show how light rays travel?... There may be more than one that is right!

• A

• B

• C

• D

Does this object give off its own light?

• yes

• no

Does this object give off its own light?

• yes

• no