33.
(a) The x-ray frequency is
f =
c
λ
=
2.998
× 10
8
m/s
35.0
× 10
−12
m
= 8.57
× 10
18
Hz .
(b) The x-ray photon energy is
E = hf = (4.14
× 10
−15
eV
·s)(8.57 × 10
18
Hz) = 3.55
× 10
4
eV .
(c) From Eq. 39-7,
p =
h
λ
=
6.63
× 10
−34
J
·s
35.0
× 10
−12
m
= 1.89
× 10
−23
kg
·m/s .