Question

Calculate the energy in joule corresponding to 1023 photons with wavelength 6630 Å: (Planck’s constant h = 6.63 × 10−34 Js; speed of light c = 3 × 108 ms−1)​

Answer 1

Answer:

ANSWER

The relationship between the enrgy of light and its wavelength is as given below.

E=

λ

hc

Substitute values in the above expression.

E=

45×10

−9

6.63×10

−34

×3×10

8

=4.4×10

−18

Hence, the energy of light corresponding to wavelength 45 nm is 4.42×10

−18

.