## Light Absorbed/ emitted

$c=\lambda v$

JustinHorriat_4f
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

### Light Absorbed/ emitted

When is light emitted and when is it absorbed. Why was it positive on the midterm when light is absorbed? And What does it mean for light to be emitted or absorbed?

Jacob Motawakel
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am
Been upvoted: 1 time

### Re: Light Absorbed/ emitted

Light is emitted if there is a quantum drop, and light is absorbed when there is a quantum jump.

April Meza 3K
Posts: 66
Joined: Sat Sep 21, 2019 12:36 am

### Re: Light Absorbed/ emitted

If there is a jump in energy levels then the light is absorbed. if there is a drop in energy levels then the light is emitted.

Kaitlyn Jang 1F
Posts: 45
Joined: Sat Aug 17, 2019 12:16 am

### Re: Light Absorbed/ emitted

Light is absorbed when energy level increases (electron gets excited). Light is emitted when energy level decreases (electron goes back to ground state).

Simon Dionson 4I
Posts: 107
Joined: Sat Sep 14, 2019 12:17 am

### Re: Light Absorbed/ emitted

If light is absorbed, a system is receiving an input of energy, so the value is positive. If light is emitted, a system is releasing energy (essentially losing it), so the value is negative.