When a drinking straw is placed in a glass of water, it appears bent because of

• depth

• air in the water

• refraction

• reflection

Look at this picture carefully. This is an example of

• absorption

• reflection

• refraction

• transmition

The speed of light is

• 300 000 000 m/s

• 343 m/s

• 3 km/s

• 0.3 m/s

Which of the following are true about light?

• Light can travel through empty space.

• Light cannot be reflected.

• Light travels fast.

• Light travels in a straight line.

What happens to light when it passes from air into water?

• It stops.

• It bends.

• It disappears.

• It changes to sound.

What are the rainbow colours in order?

• ROYBGIV

• ROGYBIV

• ROBYGIV

• ROYGBIV

What is the part labelled 1?

• Objective lens

• Eye-piece lens

• Stage

• Mirror

What is the part labelled 2?

• Fine focusing wheel

• Eye-piece lens

• Stage

• Mirror

What is the part labelled 3?

• Fine focusing wheel

• Eye-piece lens

• Coarse focusing wheel

• Mirror

What is the part labelled 4?

• Objective lens

• Eye-piece lens

• Coarse focusing wheel

• Mirror