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Millikan verified Einstein's photoelectric equation. How? |
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Answer» Solution :According to Einstein.s photoelectric equation, `(1)/(2)mv_("max")^(2)=H(upsilon-upsilon_(0))` If `V_(0)` is the stopping potential, then `(1)/(2) mv_("max")^(2)=eV_(0)` Combining the above two equations we get `eV_(0)=hupsilon-hupsilon_(0) or V_(0)=(h)/(E )upsilon-(h)/(e )upsilon_(0)` The above equation predicts that the `V_(0)` versus `upsilon` curve is a straight line with slope `(h)/(e )`. R.A. Millikan experimentally studied the nature of stopping potential versus frequency curve for different metals. From his experiments he hot straight line as predicted by Einstein.sequation. Not only that he also calculated the VALUE of h using known value of .e. and the slope obtained.  The result obtained `(6.626xx10^(-34)Js)` was in agreement with the actual value of .h.. Thus Millikan experimentally VERIFIED Einstein.s photoelectric equation. |
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