12: Radiation And Matter

Question 1

Equation for frequency and wavelength

Answer 1

C=f lambda

Question 2

What are the different regions of electromagnetic spectrum

Answer 2

RICH MEN IN VEGAS USE EXPENSIVE GADGETS
radio micro infrared visible light ultraviolet X-rays gammas rays
10^3. 400-700nm. 10^-12

Question 3

Link energy to frequency

Answer 3

E=hf using plancks constant

Question 4

What is the equation for the Doppler effect

Answer 4

Change In wavelength/ og wavelength= v/c

Question 5

Explain the Doppler effect?

Answer 5

Graph shows as objects get further away there velocity increases, this shows as an objects receeds its wavelength is stretched towards the red side of the spectrum “red shift”

Question 6

How does an electron transition energy levels?

Answer 6

To move to a higher energy level the electron absorbs a photon with a frequency exactly equal to the difference in eenergy levels

Question 7

Explain the energy level equation for a hydrogen atom

Answer 7

Energy required to move electron from ground state to level n E(n)=R’(1-1/n^2)