rules Flashcards
mas2alet el talat abtal
metal-light-electron
E incident= Ew + K.E
lw la2eit Siret 2 bs (electron-photon)
Compton effect
Eph + zero = Eph + E electron
PL ph + zero = PL ph + PL electron
lw gab Siret el photon bs
7aga men 3
E= hu = hc/W.L = mc²
PL= mc = h/W.L = hu/c
Mass= h/c×W.L = hu/c²
lw gab siret electron microscope or C.R.T (electron bs)
eV= ½mV² W.L= h/mV
mas2alet el force
F= 2Pw/c = 2huN/c.t = 2QL.PL QL= N/t = power/hu
wien’s law
W.L(max)1/W.L(max)2 = T2/T1
C.R.T converts …. to …. energy
electrical to electromagnetic
how to increase brightness of final image on the screen of CRT
- increasing intensity
- increasing potential of the grid(+ve) & decreasing negativity (-ve) which will decrease repulsion, therefore, letting more electrons pass which increases the brightness.
G.R. there must be a vacuum inside the CRT
because the air resistance is very high due to collisions of electrons with it
what does the photoelectric effect depend on according to the classical physics
time & intensity
3a4an electron y5rog with K.E
U > Uc, W.L < W.Lc, E > Ew
there’s no emission when
U < Uc, W.L > W.Lc, E < Ew
Compton’ effect (photon)
Kolo decrease
velocity constant
wave length increase
Compton’s effect (electron)
kolo increase
mass constant
wavelength decrease
difference and similarity between electromagnetic waves
differ in U & wavelength
same in C
