UV light vs. visible light

  • #1

Homework Statement



UV light causes sunburn, whereas visible light does not. Explain.

Homework Equations



N/A

The Attempt at a Solution



I'm guessing that it might have sinething to do with the electromagnetic spectrum.
 

Answers and Replies

  • #2
Dick
Science Advisor
Homework Helper
26,260
619
Probably. Since it's electromagnetic. Might have something to do with the energy of photons as well. Can you give this a little more thought?
 
  • #3
Is it because in UV light, the energy of the photons is much greater than the energy of photons in visible light?
If so, why does the energy of the photons have anything to do with getting sunburn?
 
  • #4
Dick
Science Advisor
Homework Helper
26,260
619
Because sunburn is caused bythe photons causing damage to organic molecules. What might 'causing damage' have to do with the energy of the photons? Think photoelectric effect.
 
  • #5
23
0
lol... photelectric effect, bits of my skin being imparted with energy and flying off my body?
 
  • #6
Dick
Science Advisor
Homework Helper
26,260
619
"Photoelectric effect" as in some processes require a minimum photon energy to proceed.
 
  • #7
555
0
You have probably seen a demonstration of the photoelectric effect once, where your teacher shines a lamp on a cathode/anode device. You might remember that not the intensity, but the frequency (color) of the light was what decided if and how much electrons are released. The same concept applies here.
 

Related Threads on UV light vs. visible light

  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
0
Views
2K
  • Last Post
Replies
1
Views
302
Replies
2
Views
937
  • Last Post
Replies
5
Views
5K
  • Last Post
Replies
8
Views
3K
Replies
4
Views
3K
Replies
1
Views
2K
Replies
2
Views
4K
Replies
3
Views
2K
Top