Set 1

Question 1

Relationship between surface power and secondary focal length

Answer 1

F = n’/f’

Question 2

Relationship between surface power and primary focal length

Answer 2

F=-n/f

Question 3

Image formation by spherical surfaces

Answer 3

Three rays

1. A parallel ray, passes through F’
2. A ray that passes through C does not deviate
3. A ray that passes through F, emerges parallel to the optical axis

Question 4

Snells law

Answer 4

n1 sin(pheta1)= n2 sin(pheta2)

Question 5

Object vengeance

Answer 5

L=n/l

Question 6

Image vergence

Answer 6

L’=n’/l’

Question 7

The vergence relationship

Answer 7

L+F=L’