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A photon collides with a stationary hydrogen atom in ground st

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A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is $10.2 eV$ . After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of $15 eV$ . What will be observed by the detector?

2 photons of energy

10.2 eV

2 photons of energy

1.4 eV

One photon of energy

10.2 eV

and an electron of energy

1.4 eV

One photon of energy

10.2 eV

and another photon of energy

1.4 eV

Views: 5,985 students

Updated on: Apr 11, 2023

Book:

Optics And Modern Physics (DC Pandey)

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Lucas Discussed

A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is

10.2 eV

. After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of

15 eV

. What will be observed by the detector?

9 mins ago

Discuss this question LIVE

9 mins ago

Text solutionVerified

The first photon will excite the hydrogen atom (in ground state) to first excited state (as

E_{2} - E_{1} = 10.2 eV

). Hence, during de-excitation a photon of

10.2 eV

will be released. The second photon of energy

15 eV

can ionise the atom. Hence, the balance energy, i.e.

(15 - 13.6) eV = 1.4 eV

is retained by the electron. Therefore, by the second photon an electron of energy

1.4 eV

will be released.

∴

Correct answer is (c).

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Question Text	A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is $10.2 eV$ . After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of $15 eV$ . What will be observed by the detector?
Updated On	Apr 11, 2023
Topic	Atoms
Subject	Physics
Class	Class 12
Answer Type	Text solution:1 Video solution: 11
Upvotes	1185
Avg. Video Duration	8 min

Text solutionVerified

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A photon collides with a stationary hydrogen atom in ground state inelastically. Energy of the colliding photon is 10.2eV. After a time interval of the order of micro second another photon collides with same hydrogen atom inelastically with an energy of 15eV. What will be observed by the detector?

Text solutionVerified

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