Questions
If the radius of the first Bohr orbit is x, then de-Broglie wavelength of the electron in the third orbit is nearly
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a
2πx
b
6πx
c
9x
d
x3
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Correct option is B
Angular momentum is quantized, hencemvrnnh2πBy Bohr's theory a0=Bohr's radius = xrn=n2a0Z=9a01=9x∴ mv9x=3h2π∴ mv=h6πxBy de-Broglie's equation λ=hmv=hh/6πx=6πxSimilar Questions
At 200°C,hydrogen molecule have velocity 2.4 × 105 cm s-1. The de Broglie wavelength in this case is approximately
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