Light

Question 1

Photoelectric effect

Answer 1

Light’s ability to eject an electron is dependent on frequency and not intensity - implies light as photons not wave

Question 1

EM spectrum interaction with matter

Answer 1

Electron positron pair - ionisation - electron level changes - molecular vibrations - molecular rotation - nuclear and electron resonance

Question 2

How light interacts with matter

Answer 2

Trabsmission - Refrection - Refraction - Diffraction - Absorbtion - Scattering

Question 3

Transmission

Answer 3

Will not occur if wavelength of light is similar size to the particles or if light has correct energy to be absorbed.

Question 4

n = c/v

Answer 4

n = medium
v = speed of light in medium m/s

Question 5

snell’s law

Question 6

diffraction

equation

Answer 6

bending of waves around an opening
bending is relative to the wavelength

dsintheta = n lamda

d is distance between slits

Question 7

reflection and scattering

Answer 7

when light interacts with a surface with free electrons it wont penetrate the surface, either reflected or absorbed.
Dielectric surfaces can also reflect light, but can undergo other interactions at same time (scattering etc).

Question 8

Calculate refraction and defraction