If the frequency of the incident radiation on the cathode of a photocell is doubled, how will the following change? (a) Kinetic energy of electrons (b)
Photoelectric current State reasons to justify your answer.
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If frequency increases K.E increases.
Photoelectric current is produced when light rays fall on the surface of a metal.
Explanation:
- Kinetic energy (K.E) of photo electrons depends on the energy of light.
- Energy of light depends on its frequency.
- If frequency is increased then Kinetic Energy of photo electrons will increase According to the formula
- K.E=h.f - ϕ
- Here f is the frequency of light.
- "h" is Planck's constant.
- "ϕ" is threshold energy.
- The value of ϕ is constant therefore the kinetic energy will increase.
- Photoelectric current is produced when light rays fall on the surface of a metal.
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