Colour Part 1

Question 1

Three requirements of colour

Answer 1

Source of illumination, object to interact, eye to observe.

Question 2

Shorter wavelengths have

Answer 2

Higher energy

Question 3

Which has a longer wavelength? Red or Blue

Answer 3

Red

Question 4

Which has higher energy? Red or Blue

Answer 4

Blue

Question 5

Define Hue

Answer 5

The actual colour, defined by wavelength

Question 6

Define Strength

Answer 6

Saturation of Hue, defined by amplitude of wavelength

Question 7

Define Vividness

Answer 7

Purity of Colour, defined by number of absorptions and how narrow the range of absorptions is.

Question 8

What causes promotion of election from ground state to an excited state?

Answer 8

Electromagnetic Radiation

Question 9

What region of light is between 280-750nm?

Answer 9

Visible

Question 10

What causes something to be fluorescent?

Answer 10

Molecule undergoes an electronic transition by absorbing energy from light, after loss
of some energy as heat it transitions to the ground state by emitting lower frequency
light

Question 11

What does UV-vis Absorption Spectroscopy measure?

Answer 11

Wavelength absorbed, useful for transparent objects.

Question 12

What does Visible Reflectance Spectroscopy measure?

Answer 12

Wavelength reflected, useful for colour matching

Question 13

Define additive colour mixing

Answer 13

mixing of primary colours so that the source of illumination is directly observed.