1. What particle within an atom vibrates to generate electromagnetic radiation? This particle is vibrating back and forth between what? 2. How can a hydrogen atom, which has only one electron, create...

1. What particle within an atom vibrates to generate electromagnetic radiation? This particle is vibrating back and forth between what?

2. How can a hydrogen atom, which has only one electron, create so many spectral lines?

3. Which color of light comes from a greater energy transition—red or blue?