PH3151 ENGINEERING PHYSICS

PH3151 ENGINEERING PHYSICS

Assessment

Flashcard

Physics

University

Medium

Created by

Sethuraman B

Used 1+ times

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21 questions

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1.

FLASHCARD QUESTION

Front

Life time of electron in ground state of an atom in seconds

Back

Infinite

2.

FLASHCARD QUESTION

Front

Population inversion for Lasing action means

Back

More electrons in metastable state than ground state

3.

FLASHCARD QUESTION

Front

According to Einstein at equilibrium

Back

Rate of absorption of radiation is equal to rate of stimulated emission

4.

FLASHCARD QUESTION

Front

What happens if an optical resonator is not formed?

Back

Output would be there but would stop very soon

5.

FLASHCARD QUESTION

Front

Find the difference between two energy levels of Neon if the transition levels gives a photon of wl 6328 Angstrom.

Back

3.14 X 10-19 J

6.

FLASHCARD QUESTION

Front

In Ruby laser optical pumping is done through

Back

external green light

7.

FLASHCARD QUESTION

Front

In He-Ne laser, which atoms provide active energy levels for transitions?

Back

Ne atoms

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