Where does colour come from?

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  • Created by: J.E.C.
  • Created on: 21-04-14 11:45
If all wavelengths of light are transmitted, the object appears..?
Colourless
1 of 15
If all wavelengths of light are reflected, the object appears..?
White
2 of 15
When absorption occurs, wavelengths corresponding to one colour are ___ from white light, and you see the ___ colour?
Removed, complementary
3 of 15
The colour seen is ___ to the colour light that is ___?
complementary, absorbed
4 of 15
If orange light is absorbed by an object, what colour will the object appear?
Blue
5 of 15
If yellow-green light is absorbed by an object, what colour will the object appear?
Violet
6 of 15
If blue-green light is absorbed by an object, what colour will the object appear?
Red
7 of 15
If blue-violet light is absorbed by an object, what colour will the object appear?
Yellow
8 of 15
When an atom absorbs visible radiation, __ ___ ___ to a higher __ __, we represent an atom in an excited state as __?
An electron moves, energy level, X*
9 of 15
The same thing happens when ___ absorb visible radiation?
Molecules
10 of 15
How would you represent a molecule in an electronically excited state?
X2*
11 of 15
The bonds in the molecule can ___, energy gaps between vibrational energy levels are about 100 times ___ than the energy gaps between __ ___ __?
Vibrate, smaller, electronic energy levels
12 of 15
When a molecule absorbs visible radiation, an electron is ___ and the molecule goes into one of the several possible __ __ __?
Promoted, excited electronic levels.
13 of 15
The energy absorbed is ___ as __ __? Small quantities of vibrational energy are also lost in collisions with other molecules, so the molecule ___ to a ___ ___ ___ within the __ __ __?
Re-emitted, visible radiation. Drops, lower vibrational level, same electronic level
14 of 15
This means molecules move around more ___ and the sample becomes ___?
Vigorously, warmer
15 of 15

Other cards in this set

Card 2

Front

If all wavelengths of light are reflected, the object appears..?

Back

White

Card 3

Front

When absorption occurs, wavelengths corresponding to one colour are ___ from white light, and you see the ___ colour?

Back

Preview of the front of card 3

Card 4

Front

The colour seen is ___ to the colour light that is ___?

Back

Preview of the front of card 4

Card 5

Front

If orange light is absorbed by an object, what colour will the object appear?

Back

Preview of the front of card 5
View more cards

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