MHT CET · Physics · Dual Nature of Matter
Light of frequency two times the threshold frequency is incident on photosensitive material. If the incident frequency is made \(\left(\frac{1}{3}\right)^{\mathrm{rd}}\) and intensity is doubled, then the photoelectric current will
- A increase
- B decrease
- C be zero
- D be halved
Answer & Solution
Correct Answer
(C) be zero
Step-by-step Solution
Detailed explanation
Initial frequency \(v=2 v_0\)
Final frequency \(v^{\prime}=\frac{2 v_0}{3}\)
\(v^{\prime}\) is less than the threshold frequency \(v_0\)
Hence no photoelectrons will be emitted, and photoelectric current will be zero.
Final frequency \(v^{\prime}=\frac{2 v_0}{3}\)
\(v^{\prime}\) is less than the threshold frequency \(v_0\)
Hence no photoelectrons will be emitted, and photoelectric current will be zero.
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