Question

The no of photons of light of wavelength 7000a equivalent to 1 j. Along with solution of numerical part.

Answer 1

Answer:

Energy, E=

λ

hc

Energy of a single photon of wavelength 7000 Angstrom is

7000×10

−10

hc

put h=6.6×10

−34

Joule−second and c=3×10

8

m/s

we get energy of a single photon as E=2.829×10

−19

Joule

Number of photon in 1 Joule=

E

1J

=3.52×10

18