2 - VISIBLE LIGHT

Question 1

what is the proximal stimulation for visual perception?

Answer 1

patterned visible light

Question 2

what is light

Answer 2

electromagnetic radiation within a particular range of wavelengths

• electromagnetic radiation = ‘energy that is produced when certain things happen’

eg heating metal > produces electromagnetic radiation > photoreceptors stimulated > see hot metal as glowing (red>brighter and yellower)

Question 3

long wavelengths

Answer 3

= lower the energy of the radiation

= radio wave

Question 4

order of waves

Answer 4

long (low energy) > short (high energy)

radio > light > x-ray > gamma rays

radio = 1 x 10(11) nm
microwave = 1 x 10(7) nm
infrared = 780nm-1mm
visible light = 400-700nm
ultraviolet = 100-400nm
x-ray = 0.1nm
gamma ray = 0.001nm

Question 5

visible range of light wave wavelength

Answer 5

700nm > 400nm

VISIBLE RANGE

Question 6

diagram of wavelengths on week 1 pg 4

Answer 6

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Question 7

wavelength of light

Answer 7

1 millimetre - 10 nm

Question 8

what is a manometer

Answer 8

one millionth of a millimetre

Question 9

‘light that reaches your eye from the outside world will almost always be a mixture of all or most of the wavelengths within the visible range’

significant statement ^

Answer 9

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