When an electron jumps from the second allowed orbit to the first allowed orbit in hydrogen its angular momentum changes by ________ .

Options

A. `6.6xx10^(-34) "kg m"^(2)//s`
B. `6.6xx10^(-27) "kg m"^(2)//s`
C. `1.06xx10^(-34) "kg m"^(2)//s`
D. `3.24xx10^(34) "kg m"^(2)//s`

Answer

C

Explanation

The angular momentum of allowed orbits is `(h)/(2pi),(2h)/(2pi),(3h)/(2pi),cdots` Thus difference between successive allowed orbits is ___
`(h)/(2pi)= (6.64xx10^(-34))/(2pi)`
=` 1.06 xx10 ^(-34) "kg" xx m^(2)//s`