a single photon has exactly the right amount of energy to ca

a single photon has exactly the right amount of energy to cause an electron to jump from its ground state to an excited state. there is no electron in the ground state as the photon enters the atom. what will happen?

emission
absorption
nothing

Solution

There are certain energy levels in atom.An electron is a part of atom moving in its particular level.So when an electron absorbs energy,it jumps to higher energy level from its groundstate.And when it emits energy it comes back to its original state