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Prove de Broglie law

Answer 1

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Explanation:

$From \ Einstein's \ energy \ equation\\\\E=mc^{2} \ ...(i)\\ \\From \ Planck's \ energy \ equation\\\\E=hv \ ...(ii)\\\\From \ (i) \ and \ (ii)\\\\mc^{2}=hv\\\\we \ know \ that \ v= \frac{c}{λ}$

Here I is wave length i.e. λ

$mc^{2}=h \times\frac{c}{λ}\\\\mc=\frac{h}{λ}\\\\λ=\frac{h}{mc}\\\\c \ is \ nothing \ but \ velocity \ of \ light \ so \ we \ can \ write \ c=v\\ λ=\frac{h}{mv}\\ \\\\Hence \ proved.$

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Answer 2

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