1.

Light of wavelength lamda shines on a metal surface with intensity x and the metal emits y electrons per second of average energy, z. What will happen to y and z if x is doubled ?

Answer»

y will be DOUBLED and Z will become half
y will remain same and z will be doubled
bothy and z will be doubled
y will be doubled but z will remain same.

Solution :When intensity is doubled, number of ELECTRONS emitted per second is also doubled but average ENERGY of photoelectrons emitted REMAINS the same.


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