Question

How photoelectric effect led to particle nature of light?

Answer 1

Answer:

light falls on the metal inside vaccum tube and provide energy to remove electrons outside the metal which moves as a bright shining ray from metal to other end of tube as negativity charged particle ray called as cathode ray.

Explanation:

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Answer 2

Explanation:

Photoelectric effect by Hallwack and Lenard shows particle nature as

1. In Photoelectric effect(PEE), intensity is independent of Kinetic energy of ejected electrons but according to wave theory it should be directly proportional.
2. PEE is an instantaneous process but according to wave theory ejection of electrons should take more time (hours) after incidence of waves.
3. In PEE, there is a minimum frequency required for ejection of electrons called threshold frequency but according to wave theory, electrons should eject irrespective of frequency.

So these were few points which proves that Photoelectric effect shows particle nature of light.

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