An atom is in its excited state ,Does the probalility of its coming to ground state depend on whether the radiation is alreasdy pressent or not? If you does it also depends on the wavelength of the radiation pressent?

Hydrogen atom in third excited state de-excites to the first excited state. Obtain the expressions for the frequency of radiation emitted in this process. Also determine the ratio of the wavelengths of the emitted radiations when the atom de-excites from the third excited state to the second excited state and from the third excited state to the first excited state.

The energy radiated by a body does not depends on

Does the kinetic energy of photoelectrons depend on the intensity of incident radiations?

Hydrogen atom will be in its ground state , if its electrons is in

The resistance of a straight conductor does not depend on its

How does the resistance of a wire depend on its length ?

The minimum enegry required to excite a hydrogen atom from its ground state is