Question

The number of photons of light having wavelength 100 nm which can provide 1J of energy is nearly

Answer 1

Answer:

E=

λ

nhc

n=

hc

Eλ

=

6.626×10

−34

×3×10

8

1×100×10

−9

=5×10

17

.

Hence, 5×10

17

photons of light having wavelength 100nm can provide 1J energy

Answer 2

Answer:

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Explanation:

E=n×h×c/wavelength

n=E×wavelength/hc

n=(1×100×10^-9)/(6.63×10^-34×3×10^8)

n=5.027×10^17.no.of photons are required