Electronagnetic Waves

Question 1

All the EM waves are

Answer 1

transverse

Question 2

all the waves in the electromagnetic spectrum travel at the

Answer 2

same speed in a vacuum

Question 3

who was infrared radiation discovered by

Answer 3

Herschel in 1800

Question 4

what happens when light goes through a prism

Answer 4

creates a spectrum of colours

Question 5

who discovered the ultraviolet radiation

Answer 5

Ritter in 1801

Question 6

what EM radiations can be harmful to people

Answer 6

micro waves, infrared, ultra violet and gamma/X-rays

Question 7

how are micro waves harmful to people

Answer 7

can hear human body cells, and mobile phones use microwaves and can be dangerous when the phones held close to the brain, can be links with brain tumours

Question 8

how does infrared be harmful to people

Answer 8

if the human body is exposed to too much infrared radiation then it can cause nasty skin burns

Question 9

how can ultraviolet be harmful to people

Answer 9

sunburns, when surface skin cells have been damaged by absorbing the ultraviolet rays from sunlight, can cause cell mutation, skin cancer and eye damage

Question 10

how can gamma/x-rays be harmful to people

Answer 10

cell mutation or destruction, leading to tissue damage or cancer

Question 11

how many groups is the EM spectrum split into and what are they

Answer 11

seven groups- radio waves, micro waves, infra red, visible light, ultra violet, X-rays, gamma rays