Summary A level Physics - Photons

, Photon -
a Quantum of Photoelectric Effect
energy
.
Energy of Photone N
-




At

Energy of photons of radiation is proportional to
Everpreasenu
·




frequency of that radiation
a
Frequency Radiation .



E =

not E =

energy of photon (5)
f =

frequency (M2)
= Planck constant




Photo Electric
Effect
·
When photons hit metal ,
each individual photon interacts with
metal
a
singledectron in



·
Minimum
energy required for electron to escape metal is called
the
function I


Election
game energy of photon
·
.



is
Energy is
greater
than equal to work
function electron
·
or
,

emmited .




Excess in Kinetic
energy of
· in the emited
energy dectron
.




KEY ANSWERS

The
gold Leaf electroscope doesn't work with visible
light because
·




-


Energy of a
photon is less than the work
function .