Week 4

Question 1

Which of the following statements is correct?

Answer 1

A convex lens has both sides rounded outward causing the light rays to converge towards one another. A concave lends has both sides rounded inward,causing the light rays to diverge away from one another.

Question 2

Where does the focusing in the eye of a fish occur?

Answer 2

the lens

Question 3

Where does majority of the focusing in the human eye occur?

Answer 3

air-cornea interface

Question 4

How is the lens able to change its refractive power?

Answer 4

The lens can increase its index of refraction, thus increasing its focusing power.

Question 5

How has the eye accomplished correction of spherical aberrations?
The __ is flatter at its ___ than at its ___, and the ___ is denser in the center and hence refracts more strongly at its core than at its outer layers>

Answer 5

cornea;margin;center;lens

Question 6

Referring to the last problem, is the image upright, or inverted?

Answer 6

inverted

Question 7

Referring to the last two problems, is the image real or imaginary

Answer 7

real