Threshold frequency for a metal is 10 15 Hz.Light of λ = 4000 Å falls on its surface…
Physics · JEE Advanced · NTA Exams — Atoms and Nuclei
Threshold frequency for a metal is 1015 Hz.Light of λ = 4000 Å falls on its surface. Which of the following statements is correct
- No photoelectric emission takes place
- Photo-electrons come out with zero speed
- Photo-electrons come out with 103 m/sec speed
- Photo-electrons come out with 105 m/sec speed
Answer
(A) No photoelectric emission takes place
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