AS2 2.3 Lenses Flashcards
1
Q
What are the two types of lenses?
A
- Converging
- Diverging
2
Q
What is the optical centre?
A
It is the centre of a lens, denoted as O or C
3
Q
What is the principal axis?
A
It is a line, passing through the optical centre at right angles to the centre of the lens
4
Q
What is the focal point?
A
It is the point of which rays travelling parallel to the principal axis coverage and meet after passing through a convex lens
5
Q
A
