colour and light

?
what mechanism releases energy as heat or luminescence
Dispersed metal ions
1 of 27
metal to metal charge transfer causes colour in what gemstone
sapphire
2 of 27
oxygen to metal charge transfer causes colour in what gemstone
heliodor
3 of 27
what gemstone is coloured by charge transfer without metal
amber
4 of 27
this colour centre causes the colour in fluorite
electron
5 of 27
A Hole colour centre causes the colour in what stone
smoky quartz
6 of 27
green diamonds are caused by what colour centre
vacancy
7 of 27
yellow diamonds are caused by what colour centre
vibronic
8 of 27
Nitrogen forms a ...... level
Donor
9 of 27
Boron forms a ....... level
acceptor
10 of 27
if a material has a large band gap it is
colourless
11 of 27
if a material has a small band gap it is
opaque
12 of 27
what mechanism causes light to be randomly reflected by particles in a material
scattering
13 of 27
a combination of diffraction and interferance causes the colour in what gemstone
opal
14 of 27
thin film reflection is the cause of colour in what material
labradorite
15 of 27
dislocation of the crystal structure causes what colour in diamond
brown
16 of 27
a vacancy in the crystal structure results in what absorption line measurement
741
17 of 27
the vibration of molecules and absorption from a colour centre causes what nanometer measurement
415
18 of 27
2 principle vibration directions showing different colours
dichrosim
19 of 27
splitting of white light into is spectral colours where each wavelength is refracted at different angles
dispersion
20 of 27
the degree of brightness resulting from reflection of light by a gemstone
brilliance
21 of 27
causes the colour of emerald, spinel, ruby and alexandrite
chromium
22 of 27
Almandine garnet is coloured by
iron
23 of 27
scattering causes the blue colour seen in
moonstone
24 of 27
the spreading of light when passed through a slit
diffraction
25 of 27
differential selective absorption of light by anisotropic materials
pleochroism
26 of 27
light waves that all vibrate in the same direction is said to be ......... polarised
plane
27 of 27

Other cards in this set

Card 2

Front

metal to metal charge transfer causes colour in what gemstone

Back

sapphire

Card 3

Front

oxygen to metal charge transfer causes colour in what gemstone

Back

Preview of the front of card 3

Card 4

Front

what gemstone is coloured by charge transfer without metal

Back

Preview of the front of card 4

Card 5

Front

this colour centre causes the colour in fluorite

Back

Preview of the front of card 5
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