Lenses Flashcards
1
Q
What are lenses?
A
curved pieces of material that refract light so that the rays either converge or diverge
2
Q
What lenses are thicker at the edge than the middle, and does light diverge or converge? Is the image real, or virtual
A
Concave! Diverge! Virtual!
3
Q
What lenses are thicker in the middle than the edge, and does light diverge or converge? Is the image real or virtual?
A
Convex! Converge! Real!
4
Q
What orientation, size do Concave lenses form?
A
Upright! Smaller!
5
Q
What orientation, size do convex lenses form?
A
depends on the focal length:
More than 2- smaller+upside down
1-2- upside down+bigger
less than 1- bigger+upright
6
Q
What is the focal point?
A
Point where light rays converge together
