Lenses Flashcards
1
Q
Focus
A
Where light rays converge / diverge to a single point
2
Q
Focal Length
A
Distance from the lens to the focus
3
Q
What type of shape is converging?
A
Convex
4
Q
What type of shape is diverging?
A
Concave
5
Q
What’s lens power measured in?
A
Dioptres D
6
Q
Real Image
A
An image that can be formed on a screen
7
Q
Virtual Image
A
An image that can’t be formed on a screen
