Physiology: sight - light physics

Question 1

Light is a form of electromagnetic radiation
The visible light spectrum includes what wavelengths?

Answer 1

400-700nm

Question 2

What 3 things can happen to light when it hits a surface?

Answer 2

Reflection
Absorption
Refraction

Question 3

Is most of the light we see reflected rather than radiated (eg. sun, light bulb)
What types of objects are more likely to absorb light?
2 examples of eye structures that absorb light?
As light passes into a medium where its speed is slowed, it will bend _______ the perpendicular

Answer 3

Yes
Dark, thicker, textured
Photoreceptor cell pigments, choroid
Towards

Question 4

Define:
- Focal point
- Focal distance
- Refractive power (including its units?)

Answer 4