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Diving Physics: Discuss Friday Physics Homework. in the Training Area forums: Now pay attention class. Anyone who already knows the answer can keep quiet, and no googling, I just want to ...

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Old 23-06-06, 02:15 PM
Freeflow Freeflow is offline
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Friday Physics Homework.
Now pay attention class.

Anyone who already knows the answer can keep quiet, and no googling, I just want to hear of theories as to why it happens.

Q: If reds fade first as you descend, followed by orange, yellow etc, why do flourescent colours still show as orange at 30m+ without artificial light.

A Green for the most inventive reply [no matter how surreal], and a green for the closest to the real answer.

Homework in by 1700 Monday.
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Old 23-06-06, 02:17 PM
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Old 23-06-06, 02:19 PM
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My theory is that the flourescent colours have paid more tax and bribes to the colour fairies that live in the depths, and as a result the fairies have allowed their colour to shine through instead of dimming them as they do with the regular colours which are stingy and won't pay their tax on time.
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Old 23-06-06, 02:20 PM
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Quote:
Originally Posted by ratcliffe
Yes you may go to the toilet...


My theory is that the flourescent colours have paid more tax and bribes to the colour fairies that live in the depths, and as a result the fairies have allowed their colour to shine through instead of dimming them as they do with the regular colours which are stingy and won't pay their tax on time.
id say you were the one talking....
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Old 23-06-06, 02:22 PM
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now, now - lol

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Old 23-06-06, 02:23 PM
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Me.....Me...oh, please sir .....me!!!!!!

How about because they produce the light by a chemical reaction rather than reflecting/absorbing daylight....?????

Do I win the cash?

David.
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Old 23-06-06, 02:29 PM
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IIRC, its not a chemical reaction per se, but down to the fact that they absorb light in one wavelength and then release in a different wavelength.


Of course, I could be talking a load of .....


Simon
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Old 23-06-06, 02:42 PM
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Old 23-06-06, 03:19 PM
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Quote:
Originally Posted by Freeflow
Now pay attention class.

Anyone who already knows the answer can keep quiet, and no googling, I just want to hear of theories as to why it happens.

Q: If reds fade first as you descend, followed by orange, yellow etc, why do flourescent colours still show as orange at 30m+ without artificial light.

A Green for the most inventive reply [no matter how surreal], and a green for the closest to the real answer.
I new my years studying chemistry would pay off.

Flourescent is produced when a outer shell electron absorbs a photon and is exsited into a higher shell breifly. It then falls back to its original shell releasing a photon of energy. The photon is of the same wavelength as that absorbed and so gives a bright colour.

Want to know about phosphourescent too?
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Old 23-06-06, 03:33 PM
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