Find energy of each of the photons which | Class 11 Chemistry Chapter Structure of Atom, Structure of Atom NCERT Solutions

Question:

Find energy of each of the photons which

(i) correspond to light of frequency 3× 1015 Hz.

(ii) have wavelength of 0.50 Å.

Answer:

Planck’s quantum theory = Based on the assumption that all atoms on the surface of the heated solid vibrate at the frequency, Planck developed a model that came to be known as Planck’s equation. Through experiments of frequencies and temperature, Planck was able to generate a constant, Planck’s constant

h = 6.62607 x 10^-34 J s

Using this constant he was able to restate his theory: energy was directly proportional to frequency. He wrote his equation as

E=hν

where E is energy, h is Planck’s constant, and v is frequency.

(i) Energy (E) of a photon is given by the expression,

E=hν

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

ν = frequency of light = 3 × 10¹⁵ Hz

Substituting the values in the given expression E = hv we get

E = (6.626 × 10^–34) (3 × 10¹⁵)

E = 1.988 × 10^–18 J

(ii) Energy (E) of a photon having wavelength (λ) is given by the expression,

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

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

Substituting the values in the given expression of E:

1
0
0
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Comments

Shamil pp
2019-08-19 21:08:20

You explained very simply...... so this is very usefull.... thank you alðð

Shamil pp
2019-08-19 21:07:43

You explained very simply...... so this is very usefull.... thank you alðð

Shivam rawat
2019-08-03 21:59:36

Thank you

Rajat rana
2019-08-02 12:55:45

Thanks to all

Vishal pal
2019-03-07 10:12:15

Har question ka jawab nahi milta hai

Abhay kumar
2019-01-20 19:58:14

thank you!

satyam
2019-01-16 15:21:35

thanks......bhai

Sneha
2018-09-27 20:26:37

Thanks

Harsh
2018-09-08 16:14:11

Thanks

iba babu
2017-08-16 19:07:03

thanks

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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 6: Find energy of each of the photons which (i) correspond to light of frequency 3× 1015 Hz. ....

Find energy of each of the photons which | Class 11 Chemistry Chapter Structure of Atom, Structure of Atom NCERT Solutions

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