-
What does Energy Equal?
E = cp = m[rest]c^2
-
1 eV equals how many Joules?
1.6 x 10-19 Joules
-
Mass of the electron in eV?
.511 MeV
-
Mass of the proton in eV?
938 MeV, about 1 GeV
-
What is Avogadro's number?
Na = 6 x 1023
-
How much is one "u" atomic mass unit, it eV?
931 MeV/c2
-
What does rest mass equal?
E/c2
-
What is the charge of the electron in Coulombs?
1.6 x 10-19 C
-
How do you calculate the binding Energy?
Coulombs force law
-
What is momentum in terms of velocity?
p = γumru
-
What is energy in terms of velocity?
p = γumrc2
-
E' Lorentz transformation, with respect to v, velocity of observer is:
E' = γvE - γvΒvcp
-
cp' Lorentz transformation, with respect to v, velocity of observer is:
cp' = - γvΒvE + γvcp
-
What is the mass of a neutron?
approximately the mass of a proton, 1 GeV
-
What is typical spacing between a nucleus and an election?
1 Angstrom
-
What is the relationship between energy, mass and momentum?
E2 - (cp)2 = (mrc2)2
-
What is beta2 in terms of gamma?
1 - 1/γ2
-
What is the energy of a photon?
E = cp = hυ = hc/λ
-
What is the power radiated by a moving charged particle? (Thanks Maxwell)
P = (2/3) (e2/c2) (a2)
-
What is the value of h, planks constant in terms of "hc"
1240 eV Nm
-
What is the energy in eV at a given wavelength λ of light?
E = hυ = hf = hc(f/c) = hc(1/λ)
-
What is Intensity in terms of Energy per quanta?
I = hυ * number of photons per time per area
-
How do you count the number of photons?
Intensity times area times time divided by hυ
-
What is the photoelectric effect?
Shining uv light on one parallel plate causes current. Increase voltage to other side of plate and determine the stoping voltage.
-
How do you measure KE in the photoelectric effect?
K = eVstopping
-
What is the Compton wavelength?
hc/mec2
-
What is change in wavelength due to Compton effect?
λc(1-cos x)
-
How are X-rays produced?
accelerate electron into metal, it shoots off X-rays
|
|