em spectrum

Question 1

What is the EM spectrum

Answer 1

A continuous range of wavelengths/frequencies of electromagnetic waves/radiation (with different uses)

Question 2

Uses of radio waves

Answer 2

1 Broadcasting on radio or TV
2 communication and satellite transmission
3 Radar

Question 3

Uses of Microwaves

Answer 3

1 Microwave ovens(heating foods)
2 Satellite communication

Question 4

Uses of Infrared

Answer 4

1 heating
2 thermal imaging
3 remote controls

Question 5

Uses of Ultraviolet

Answer 5

1 fluorescent lights
2 sterilisation
3 verifying money, ID, passports

Question 6

Uses of X rays

Answer 6

1 medical imaging (X-ray radiology)
2 security screening

Question 7

Uses of Gamma Rays

Answer 7

1 medical imaging
2 cancer treatment

Question 8

Dangers of radio waves

Answer 8

heat up body tissue

Question 9

Dangers of microwaves

Answer 9

heat up body tissue (specifically water)
burns

Question 10

Dangers of infrared

Answer 10

heating
skin absorption

Question 11

Dangers of UV

Answer 11

skin damage(sun burns)
eye damage(development of cataracts)
increase risk of skin cancer

wear sun cream when very sunny

Question 12

Dangers of Xrays

Answer 12

Damage cells
Ionising radiation can increases cancer risk
Acute radiation sickness

can be blocked by a lead screen

Question 13

Dangers of Gamma Rays

Answer 13

Damage cells
Ionising radiation can increases cancer risk
Acute radiation sickness

can be blocked by a lead screen or sometimes concrete

Question 14

similarities of all em waves

Answer 14

all travel at speed of light
all transverse waves