Notifications
Clear all
0
30/09/2020 4:28 pm
Topic starter
Find the frequency of light that corresponds to photons of energy 5.0 × 10-5 erg
(a) 7.5 × 10-21 sec-1
(b) 7.5 × 10-21 sec
(c) 7.5 × 1021 sec-1
(d) 7.5 × 1021 sec
1 Answer
1
30/09/2020 4:32 pm
(c) 7.5 × 1021 sec-1
Explanation:
Using E = hv, we get
v = E/h = 5.0 x 10-5 erg/6.63 x 10-34Js
= 5.0 x 10-5 erg/6.63 x 10-34 x 107 erg sec
[∴ 1J = 107 erg]
= 7.54 x 1021 sec-1