N3 Waves and Radiation

All waves carry this.

• Heat

• Water

• Energy

• Boats

What 3 colours of light combine to give white light?

• Red, Green and Blue.

• Red, Orange, Yellow, Green, Blue, Indigo and Violet.

• Orange, Yellow, Indigo and Violet.

• Red, Green and Violet.

Which type of lens can focus parallel rays of light to a point?

• Concave

• Telephoto

• Convex

• Zoom

What part of the EM spectrum carries the most energy?

• Radio

• Visible

• Microwaves

• Gamma

Which of these is a source of UV rays?

• Sun

• Transmitting aerial

• Light bulb

• Magnetron

Which of these is the unit of frequency?

• Hertz

• Amps

• Volts

• Seconds

Frequency is the number of waves in ...

• 1 second

• 1 hour

• 1 minute

• 1 day

Which of these will be a louder sound?

• Higher frequency

• Lower frequency

• Larger amplitude

• Smaller amplitude

Sound waves are produced when something...

• vibrates

• moves

• stops

• is big

Which of these has the highest speed?

• Sound in air

• Light

• A supersonic jet

• Thunder