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Absorption

Name: Anonymous 2009-05-10 12:01

Quick Question:

Something appears to look violet, because the material absorpts every spectral colors with exception of violet of course.

So why is material with violet surface heating-up faster than a material with yellow surface?

Name: Anonymous 2009-05-10 15:52

i think this has to do with the reflectivity and darkness of the object. violet is darker thus it reflects less light.

Name: Anonymous 2009-05-10 20:41

Explanation from someone not into physics:

Recall that lower wavelength connotes higher frequency. And that higher frequency entails higher energy. Yellow is at a higher wavelength (~600 nm, perhaps) than violet is (~400 nm). So a violet object is heating up faster because it has higher energy than a yellow object.

Name: Anonymous 2009-05-10 23:42

>>3
uhh.... no.

kinetic energy is proportional to velocity.
velocity is equivalent to wavelength multiplied by frequency.
If you lower the wavelength and raise the frequency, git would look something like this:

Pre:  Wavelength = 1.  Frequency = 1.
Velocity = λ*f = 1*1 = 1

After raising F, lowering wavelength:
Wavelength = .5   Frequency = 2
Velocity = λ*f = .5 * 2 =1

1=1!!! omfg you didnt do shit!

Name: Anonymous 2009-05-11 4:14

>>4
8/10, I bothered typing a response.

Planck relation: E = hf

The photon energy is dependent on the frequency, not the wavelength.

Name: Anonymous 2009-05-14 8:41

It's an effect similar to osmosis - the sun is yellow, the surface is yellow so there is minimal (if any) energy transfer. A violet surface has intrinsically less energy (shorter frequency = more energy required to heat it up) so through the `osmosis' of light, violet heats up.

Name: 4tran 2009-05-15 15:39

This is... MADNESS

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