Rutherford proposed the atomic meodel after his most stiking experiment an apha-scattering leading to discoveluy of nucleus . Bohr later on modified the atomci model on the balis of Planck's quantum theory of light and prosed the concept of stateonry cireclar orbits of quanise enrgy ` (nh) /( 2pi)` The colloection of fine lines in line spectrum led Sommerfeld to gae the idea fo elliptical orbits .He successfully explained the existence fo subshells and their number in a shell . The angular momentum of subshells was proposed as ` sqrt ( l(l +120)) . h/( 2 pi)` . The emission of a spectral line in atomic spectra was supposed to be due to the jump of elecrtron from one enrgy level to other .
The angular momentum fo elecron i ` 2p` orbital is :

Options

A. ` h/( 2 pi)`
B. ` h/(sqrt 2 pi)`
C. ` h/(sqrt 2 pi)`
D. ` h/( 2 pi)`

Answer

B

Explanation

Angurlar momentum ` = sqrt(l(l+ 1)) . h/( 2pi)`
` = sqrt(l(l+1)) . h/2pi 0 = h/( sqrt 2pi)`.