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In experiment aimed to disprove Einstein's equation how millikan proved Einstein's equation? |
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Answer» Solution :Einstein.s equation of photoelectric effect `(1)/(2)mv_(max)^(2)=v-phi0` but `(1)/(2)mv_(max)^(2)=eV_(0)` Where `V_(0)` is stopping potential `therefore eV_(0)=hv-phi0` `therefore V_(0)=((h)/(e))v-(phi0)/(e )` `therefore` above equation is similar to equation of straight line y=mx+c.  Here graph of `V_(0)tov` is straight line .`(h)/(e)` is slope of the graph which does not depend on material used. MILLIKAN MADE series of experiments and obtain slope of `V_(0)tov` graph.He obtained VALUE of slope and from that by using known value of charge of ELECTRON he obtained value of h`=6.626xx10^(-34)` Js which was known vlaue. Thus ,in attempt on disprove Einstein.s equation Millikan indirectly proved its validity. Millikan made experiment on number of alkali metals for large range of incident radiation and varified phtoelectric equation with great precision. |
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