1. in which of the following cases is the wavelength of the emitted radiation greatest? electron jumps from third orbit to second orbit. electron jumps from third orbit to first orbit. electron jumps from fourth orbit to first orbit. electron jumps from fifth orbit to second orbit.

The more energy orbits the radiation jumps the more energy it has. So if the frequency stays the same each time then the wavelength will get longer if there is more energy.

In this case the situation in which the radiation jumps the most energy orbits is when: the electron jumps from the fourth orbit to the first orbit. This will emit the longest wavelength