Section 1

Question 1

photoelectric effect

Answer 1

light knocks electrons out of the metal measured as a photocurrent

Question 2

stopping voltage

Answer 2

the maximum energy of photoelectrons. below a given frequency, Vo = 0, independent of light intensity

Question 3

Bohr model

Answer 3

v = Z^2e^4me/2hH^2 (1/n - 1/n’)

H = h/2π

Question 4

Compton scattering

Answer 4

X-ray energy much greater than binding energy: free electrons. Compton found a secondary peak at a longer wavelength with increasing scattering angle, classically the electrons should re-radiate at the same frequency as the incoming x-rays

Question 5

Compton shift

Answer 5

Δλ = λ’ - λ = h/mc (1-cosθ)

Question 6

wave-particle duality

Answer 6

de broglie wavelength

hv = pc => λ = h/p