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Identify the correct order of frequencies.

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+1 vote
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in Engineering Physics I by (558k points)
Identify the correct order of frequencies.

(a) v1 > v2 > v3

(b) v2 > v3 > v1

(c) v3 > v2 > v1

(d) v1 > v3 > v2

The question was asked in an online quiz.

The query is from PhotoElectric Effect topic in portion Quantum Physics of Engineering Physics I

1 Answer

+2 votes
by (1.4m points)
The correct answer is (c) v3 > v2 > v1

The explanation: As the frequency of the incident radiation increases, the potential required to stop the ejected electron (Stopping Potential) increases. Hence, v3 > v2 > v1.

The stopping potential varies linearly with the frequency of the incident radiation.

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