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If radius of Bohr first orbit is x, then de Broglie wavelength of electron in 3rd orbit is nearly

Answer»

`2pi x`
`9pix`
`9x`
`6pix`

Solution :`mvr_(N)=(ny)/(2pi)` or `MV((n^(2)a_(0))/Z)=(nh)/(2pi)`
Bohr.s RADIUS ofatom `a_(0)=x,=3`
`Z=1`
`:.mv(9x)/1=(2h)/(2pi)` or `mv=h/(6pix)`
`:. lamda=h/(mv)=6pix`


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