here's a Q. please answer and give your valuable reasoning.
WHICH OF THE FOLLOWING CHARACTERISTICS OF PHOTOELECTRIC EFFECT SUPPORTS THE PARTICLE NATURE OF RADIATION
A) EXISTENCE OF THRESHOLD FREQ.
B) INSTANTANEOUS NATURE OF PHENOMENON.
C) EMISSION OF E-S FROM METALLIC SURFACE UNDER IRRADIATION
D) ENERGY OF PHOTOELECTRONS IS DETERMINED BY FREQ OF RADIATION.
ANS : A,B,D . I NEEDED PROPER EXPLANATION GUYS. :P
3i can give an example for the correctness of the option A and D
consider a block placed in a rough surface .To move the block we have to give a minimum force equal to μN.below this force we cant move the block.
option B is correct
bcos if we give the force>minimum force we know that the block immediately moves in the direction of app force
1diff between particle nature and wave nature...
>> if it wud have been an wave,
1.) electrons wud have been emmitted at every wavelength.
2.) it wud hav depended on the intensity of light.
>> but from the experiments it was found that
1.) e- are emitted only afetr a certain wavelenth .
any longer wavelnth fails to emit an e-.
2.) once this reqd wavelenth is reached, there is instantaneous emmision...
(ek zaruri kaam hia... aati hun abhi :P)
1continuation to my prev to prev post....
so since the experimental results were against the hypothesis,,,
so it proves particle nature of radiations. [1]
(P.S.:- read HC Verma - part2 - pg.no.358 ... PE effect and wave theory of light.)
