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What is the number of photons of light with a wavelength of 4000 pm th...

What is the number of photons of light w | Class 11 Chemistry Chapter Structure of Atom, Structure of Atom NCERT Solutions

Question:

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

Answer:

Energy (E) of a photon = hc/λ

Where,λ = wavelength of light = 4000 pm = 4000 ×10^–12 m = 4x 10^-9 m

c = velocity of light in vacuum = 3 × 10⁸ m/s

h = Planck’s constant = 6.626 × 10^–34 Js

thefore the energy of photon (E)

= 6.626 × 10^–34 Js X 3 × 10⁸ m/s / 4x 10^-9 m = 4.965 x 10^-16 J

Now 4.965 x 10^-16 J is the energy of = 1 photon

Therefore 1 J will be the energy of = 1/4.965 x 10^-16 J = 2.014 x 10¹⁵ photons

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Comments

Makwana darsh
2019-09-04 10:45:15

The right answer is 2.012Ã10^16

Snigdha
2019-08-22 20:54:47

Yaah this is not the correct answer

Sachin
2019-08-09 19:56:44

This is not correct answer

RS
2019-08-09 05:54:14

Correct answer will be 2.012ÃÃ10^16 photons

Ujjwal kashyap
2019-08-06 20:24:39

Sir, the answer will be 2.014*10^16

dad
2019-07-03 14:12:20

this is shit

Manju Shrestha
2019-06-26 22:11:39

I have not understood nicely.....

Manju Shrestha
2019-06-26 21:30:42

Thank u.... for this solution...

Ishaan Chopra
2019-06-16 15:55:15

Energy of photon will be 4.965 * 10^-17 and hence the answer will be 2.014 * 10^16 photons

Raghunandan m s
2019-06-16 07:40:20

Write but some corrections needed

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Welcome to the NCERT Solutions for Class 11 Chemistry - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 8: What is the number of photons of light with a wavelength of 4000 pm that provide 1 J of energy?....

What is the number of photons of light w | Class 11 Chemistry Chapter Structure of Atom, Structure of Atom NCERT Solutions

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