Physical
Symbol
Dimensions
Unit
Remarks
Quantity
Planck’s
h
[ML2T –1]
J s
E = hn
constant
Stopping
V0
[ML2T –3A–1]
V
e V0= Kmax
potential
Work
f0
[ML2T –2]
J; eV
Kmax = E –f0
function
Threshold
n0
[T –1]
Hz
n0 = f0/h
frequency
de Broglie
l
[L]
m
= h/p
wavelength
EXERCISES
11 1
Find the
(a) maximum frequency, and
(b) minimum wavelength of X-rays produced by 30 kV electrons Rationalised 2023-24
289
Dual Nature of Radiation
and Matter
11 2
The work function of caesium metal is 2