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Physics GK · Q180

Modern Physics

Competitive Exams · Physics GK · question 180

Q180

The electrons are emitted in the photoelectric effect fromametal surface

A.
only if the frequency of the incident radiation is above a certain, threshold value
Answer
B.
only if the temperature of the surface is high
C.
at a rate that is independent of the nature of the metal
D.
with amaximumvelocity proportional to the frequency of the incident radiation

Answer: Option A

Solution

Answer: Option A
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