electromagnetic spectrum and rarefraction

Question 1

what are radio waves for?

Answer 1

radio signals, wifi

Question 2

what are microwaves for?

Answer 2

cooking (they’re absorbed by water)

Question 3

what are infrared rays used for?

Answer 3

cooking (absorbed by the food’s surface)

Question 4

what are uv rays used for?

Answer 4

tanning (they cause skin cancer)

Question 5

what are x-rays for?

Answer 5

medical (also dangerous)

Question 6

what are gamma rays used for? how are they produced?

Answer 6

medical treatments, steralising (dangerous)

Question 7

what are all em waves emitted and absorbed from?

Answer 7

electrons

Question 8

how do electrons lose energy?

Answer 8

as em waves

Question 8

what happens if the wave has a high frequency?

Answer 8

the energy is higher and the wavelength is shorter

Question 9

which 3 em rays are examples of ionising radiation?

Answer 9

uv, x-ray, gamma

Question 10

what happens when waves enter a new medium (material)

Answer 10

they change speed, and therefore thier angle too

Question 11

whats the normal line?

Answer 11

the line drawn perpendicular to the surface (straight line across rectangle)

Question 12

what happens if the wave slows down?

Answer 12

it bends towards the normal

Question 13

whats the angle of rarefraction?

Answer 13

angle inside rectangle

Question 14

what’s the angle on incidence?

Answer 14

angle outside of rectangle