Chemistry, asked by KAUTAM, 1 year ago

What is the number of photons of light with a wavelength of 4000
pm that provide 1j of energy?

Answers

Answered by itzIntrovert
25
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Energy of photon = hc/lembda

→ where lembda = wavelength of light = 4000*10^-12m

→ C = velocity of light =3*10^8m/s

h = planks constant =6.626×10^-16

therefore,

E = 6.626*10^-34×3*10^8/ 4000*10^-12

E =4.96×10^-19

now,

4.96 ×10^-16 J is the energy of one photon

so,

1J will be the energy of 1/4.96*10^-16

=2×10^15photons

:)
Answered by mukund1002
8

Answer:

2×10^16 photons.

Explanation:

See the picture.

Hope it helps.

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