p39 033

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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 .


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