Is light being emitted or absorbed?

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J-Girl
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is light being emitted or absorbed??

How do I know if light is being absorbed or emitted? I had to find the energy and wavelength of the following transitions, for the first two i ended up with positive numbers, for the last two I ended up with positive numbers
1.1-->2
2.3--4
3.5-->1
4.4-->1
 
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J-Girl said:
How do I know if light is being absorbed or emitted? I had to find the energy and wavelength of the following transitions, for the first two i ended up with positive numbers, for the last two I ended up with positive numbers
1.1-->2
2.3--4
3.5-->1
4.4-->1

Level 1 usually refers to ground state, so energy is absorbed going to a higher number, and emitted when changing to a lower number level.
 
  • #3


thankyou:) my textbook didnt tell me that unfortunately
 
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