Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Wavelength of photon emited when an electron in H-atom jumps from an orbital having 2 angular nodes with one spherical node to an orbital having total 1 node is- - Sarthaks eConnect

Wavelength of photon emited when an electron in H-atom jumps from an orbital having 2 angular nodes with one spherical node to an orbital having total 1 node is-

`1240/10.2 nm`

`1240/1.89 nm`

`1240/2.55 nm`

`1240/0.66 nm`