Lenses and the eye

Question 1

concave lens

Answer 1

diverging lens:
forms virtual image-
upright, smaller than the object, same side of the lens as the object

Question 2

convex lens

Answer 2

converging lens:
forms real image-
diminished, image is formed on the other side of the lens to the object, inverted
forms virtual image-
upright, magnified, same side of the lens as the object

Question 3

hyperopia

Answer 3

long sightedness- cannot focus of nearby objects
image formed behind retina
eye ball is too short or lens is too weak/thin
corrected by converging (convex) lens

Question 4

myopia

Answer 4

short sightedness- cannot focus on far away objects
image formed before retina
eye ball is too long or lens is too thick/powerful
corrected by diverging (concave) lens