Question

7. A photon of violet light has a frequency of 7.57 x 10' Hz. How much

energy (in electron-volts) does this photon carry?
O 5.01 ev
O 183 ev
O 3.13 eV
оо
8.76 eV​

Answer 1

3.13 eV

Step-by-step explanation:

E = hf

f =7.57 x 10' Hz.

h = 6.62× 10-34Js

E = 6.62× 10-34 × 7.57 x 10' Hz

E = 5.011× 10^ -30 J

1eV = 1.6×10^-19J

Hence ,

5.011× 10^ -30 J ÷1.6×10^-19J

= 3.132×10^-49