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?

• Light travels faster than sound.
• Light and sound travel at the same speed.
• Sound will not travel. Only light can travel.
• Sound travels faster than light.

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

• apparent.
• opaque.
• oblong.
• transparent.

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

• light from our eyes shines on them.
• they are luminous.
• the Sun shines on them.
• light from them enters our eyes.

Opaque objects can:

• transmit and reflect light.
• reflect and absorb light.
• only reflect light.
• transmit and absorb light.

Which of these will absorb the most light?

• a white sheet of paper
• a sheet of clear glass
• a black piece of card
• an orange piece of card

Which of these statements is true?

• Light bounces evenly off rough surfaces.
• Light bounces evenly off smooth surfaces like mirrors.
• Light bounces off mirrors in all directions.
• Light does not bounce off mirrors.

A plane mirror is:

• a curved mirror.
• a convex mirror.
• a flat mirror.
• a mirror used in aeroplanes.