Uses and dangers of EM Waves

Question 1

explain the use of radio waves

Answer 1

communication between tv, radio signals this is because they can travel long wavelengths without losing quality of sound

Question 2

explain the use of microwaves

Answer 2

used for cooking, as microwaves are absorbed by and heat fat/water in foods.

Question 3

explain the use of infrared radiation

Answer 3

infrared cameras, tv remotes, thermal imaging, electrical heaters, ovens and grills

Question 4

explain the uses of visible light

Answer 4

allows us to use phones, ipad (sources of technology)

Question 5

explain the uses of ultraviolet radiation

Answer 5

sterilisation , sun tanning, fluorescent security

Question 6

explain the uses of X-rays

Answer 6

Medical imaging and treatment, because they are very high energy and can easily penetrate body tissues.

Question 7

explain the uses of gamma rays

Answer 7

used in medical treatments, (radiotherapy for treating) cancer
to sterilise medical equipment and food

used in hospitals as they have the highest energy of all the em waves therefore can be used to destroy tumours in radiotherapy.

Question 8

dangers of ultraviolet waves:

Answer 8

can cause the skin to age prematurely

can damage skin cells

can increase the risk of developing skin cancer

Question 10

dangers of x-rays and gamma rays:

Answer 10

can cause mutations in genes

can lead to increased risk of developing various cancers

Question 11

dangers of infrared radiation:

Answer 11

can cause burns to skin/tissue

Question 11

what are the effects of body cells absorbing radiation?

Answer 11

large amounts can damage cells. smaller amounts cause mutation, causing cells to divide rapidly, which can lead to cancer.

Question 12

which em waves are said to be the most dangerous

Answer 12

gamma and x-rays as they have the most energy