Lenses Flashcards
(6 cards)
1
Q
Convex (distant object)
A
Inverted
Diminished
Real image
2
Q
Convex (close object)
A
Magnified
Upright
Virtual image
3
Q
Concave
A
Diminished
Upright
Virtual image
4
Q
Power of a lens
A
P=1/F Measured in dioptres (D)
5
Q
The lens formula
A
1/f = 1/u + 1/v f = focal length u = distance between object and lens v = distance between image and lens
6
Q
Intensity formula
A
I = P/A P = energy on a m^2 A = area I = energy per m^2 per second
