Waves Quiz

Use waves from the list to answer the following questions. You may use each wave once, more than once or not at all. (i) Which wave is not in the electromagnetic spectrum?

• Infrared

• Microwaves

• Sound

• Ultraviolet

• X-rays

Use waves from the list to answer the following questions. You may use each wave once, more than once or not at all. (ii) Which wave can be used to find metal objects in a suitcase?

• Infrared

• Microwaves

• Sound

• Ultraviolet

• X-rays

Add the missing parts of the spectrum to the above diagram.

Going from left to right, what property is increasing in the diagram? Put a ring around the correct answer.

• energy

• frequency

• wavelength

• wave speed

Different parts of the electromagnetic spectrum are used for different purposes. Draw straight lines to link each part of the electromagnetic spectrum to its use.

Radiographers work in hospitals and are regularly exposed to X-rays. X-rays cause damage to the human body. State the damage that may be caused by X-rays.

Suggest and explain how people working with X-rays can be protected from damage.

Radiographers also use gamma ray sources. X-rays are produced by electrically powered machines. Gamma rays cause similar damage to X-rays, but the radioactive materials giving out gamma rays are more dangerous than X-ray machines. Explain why this is so.

Rachel does an experiment to investigate the heating effect of electromagnetic radiation. She measures the temperature change of the water in the beaker. Complete the sentences to explain what is happening to the electromagnetic radiation. Use words from the list. The electromagnetic radiation is __________________ by the heater. It is then __________________ through the atmosphere and finally __________________ by the water.

• absorbed

• emitted

• ionised

• transmitted

Brian will not get a microwave oven for his kitchen. He is sure they are dangerous. His ideas are a bit confused. Explain to Brian why he is wrong, and why microwave ovens are safe to use.