EM radiation stars

Question 1

How does emission spectrum work?

Answer 1

(When hot gas emits photons)
- when a molecule absorbs energy, electrons move to higher energy levels releasing light in a spectrum
- Bright lines on a dark background

Question 2

Absorption spectrum

Answer 2

• White light passes through a substance and electrons in the atoms jump to higher energy levels resulting in dark lines on a continuous spectrum.

Question 3

What happens when an electron moves to a lower energy level?

Answer 3

a photon is emitted

Question 4

What does the wavelength of the emitted photon depend on?

Answer 4

The energy difference between two levels