1. Compton Effect Heisenberg Uncertainty Principle

2. Momentum of Light p = hf/c = h/λ
Is momentum Conserved?
Since a stationary electron can gain some velocity and thus momentum in the photoelectric effect something needs to lose momentum in order for momentum to be conserved.
Momentum of Light p = hf/c = h/λ

3. Compton Effect λ’ – λ = h/mc (1 – cos θ)
h/mc = 2.43x10-12 m
What is the max. possible change in wavelength?

4. Light of wavelength 6nm hits an electron and is scattered by 60o
Light of wavelength 6nm hits an electron and is scattered by 60o. What is the new wavelength of the light?

5. Heisenberg Uncertainty Principle
There is a fundamental uncertainty in the measurement of momentum and position or energy and time interval.
Δp * Δy > h/4π
ΔE * Δt > h/4π

6. If you can measure the position of a brick (m =1kg) within Δx =
If you can measure the position of a brick (m =1kg) within Δx = .1 nm what is the corresponding uncertainty in the speed of the brick?

7. Within the atom the electron is confined to a space of about 1
Within the atom the electron is confined to a space of about 1.0x10-10m. What is the uncertainty in its momentum?