The well known physicist, ‘Albert Einstein’ always used to
say “A single piece of paper cannot decide your future.” This quote has now
become one the most used ‘motivational’ quote. This motivates one who is a student;
this quote says that a paper in which you scored less marks is of no use for
your future because your future depends upon your own knowledge and thinking
which you posses in your mind. So this a simple saying but the beautiful irony
in the statement is that a single piece of paper of Einstein on Photoelectric
effect in 1905 really change the future of both Einstein and Quantum physics.
His explanations to the photoelectric effect is a bench mark in the growth of
quantum mechanics
So diverting the mind from motivation to the Science can be a
great thing so here it is.
The Photoelectric effect is one of those beautiful experiment
ever performed for perplexing ideas. Actually it consist of a metal surface on
which a light beam incidents, it was then observed that the metal after then
immediately start emitting photo electrons. But the important point is that it
does not emit photo electrons for each and every sort of light I mean every sort
of wavelength a particular wavelength is required for a particular metal which
really puzzled scientists. According to the classical picture a single
wavelength can eject electrons if kept for a long time but unfortunately or I
should say fortunately this was not the case
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