Question

Define hallwach and lenard observation on photoelectric effect

Answer 1

Explanation:

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• Photoelectric effect by Hallwack and Lenard shows particle nature of light.
• Intensity of light is independent of Kinetic energy of ejected electrons.
• PEE is an instantaneous process.
• In PEE, there is a minimum frequency required for ejection of electrons called threshold frequency.
• Photoelectric current is directly proportional to the intensity of light.
• Stopping Potential is directly proportional to the frequency of incident light.

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