Chen

The bright light (line) spectra observed for different elements result from

electrons moving to lower energy levels.

You measure the wavelength of a radio wave in the lab. It has a long wavelength (around 100 meters).

What does this suggest about the energy of this wave?

The wave has low energy.

What is the relationship between frequency and wavelength?

Indirect, as frequency decreases the wavelength increases

For an electron in an atom to change from the ground state to an excited state

energy must be absorbed.

All electromagnetic waves travel through a vacuum at...

the same speed.