Light of frequency 1.5 times the threshold frequency is incident on a photo sensitive material. If the frequency is halved and intensity is doubled the photo electric current becomes
Correct answer: D. Zero
- A. Four times
- B. Double
- C. Half
- D. Zero
Explanation
When the frequency of incident light is halved of its original value i.e. 1.5vo then it becomes less than the threshold value. In that case, no photoelectric effect takes place. No photoelectrons would be emitted. The photoelectric current becomes zero.
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About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
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