Question

181. The approximate wavelength of photon In angstroms
having an energy of 2 ev is?
A. 5000 Å
B. 6000 Å
C. 8000 Å
D. 12000 Å
solution please​

Answer 1

Explanation:

ANSWER

1eV=1.602×10

−19

joule;

h=6.62×10

−34

J−s, c=3×10

8

ms

−1

λ=

E

h⋅c

=12.42×10

−7

m=12.42×10

3

A

˚

.