Lecture 6

Question 1

Visible light

Answer 1

380-760 nm

Question 2

Wavelength

Answer 2

Perception of colour

Question 3

Intensity

Answer 3

Perception of brightness

Derived from the amplitude of the waveform

Question 4

Cornea

Answer 4

Transparent outer covering of the eye
Where light first enters the eye
Works with the lens to bend light
15% of the outer eye - sclera is opaque and makes up the rest

Question 5

Pupil

Answer 5

Regulates the amount of light that passes from the cornea to the rest of the eye
Hole in the middle of the iris (muscle ring just behind the cornea)
Size changes with illumination

Question 6

Pupil constriction

Answer 6

In response to bright light
Uses sphincter muscles
Creates sharper image
Decreased sensitivity, but sensitivity not important if well-lit