Light acting on a particle

Question 1

what is black body radiation?

Answer 1

black body is a theoretical object hat doesn’t reflect any radiation - it absorbs all light acting on it and emits radiation based on thermal energy

Question 2

how to describe the relationship between energy per quanta and frequency?

Answer 2

E = energy per quanta

light is modelled as being made up of quanta (particles of light)

Question 3

explain this graph

Answer 3

blue line = what the expected trend line should look like

redline = what the actual trend line looks like.

Question 4

what does weins law explain

Answer 4

it explain the max wavelength of a black body at a particular temperature.

Question 5

what is a photon

Answer 5

a quantum of all forms of electromagnetic energy; a gauge boson responsible for mediating the electromagnetic force.

Question 6

Question 7

what is the photo electric effect?

Answer 7

Question 8

what are two ways of finding the threshold frequency?

Answer 8

1. f(0) = W/h
2. a graph of kinetic energy against light frequency