For the element barium, which wavelength of light is produced by the largest drop in energy for an electron? which represents the smallest drop? explain.

The wavelength decreases in the order:

Red, orange, yellow, green, blue, indigo, violet

Because a larger transition in electron state releases a larger amount of energy, it will produce light of lower wavelength. Conversely, a smaller change in energy will release light with a higher wavelength.

Explanation: