CD1 - Coloured Molecules Flashcards
1
Q
Why do wite opaque solids appear white in sunlight?
A
none of the wavelengths of incident light are absorbed by the surface - ALL REFLECTED
–> mixture of all wavelengths of visible light = white
2
Q
When light shines through colourless transparent substances …
A
none of the wavelengths of incident light absorbed - ALL TRANSMITTED
3
Q
When absorption occurs, wavelengths corresponding to one colour are removed from the white light + you see the …
A
complementary colour
4
Q
An object absorbing violet appears
A
yellow
5
Q
When substances absorb radiation in the visible part of the spectrum, the energy absorbed…
A
causes changes in electronic energy and electrons are excited from their normal state to an EXCITED STATE
