unit 4 - sign conventions

Question 1

focal point +/-
concave mirror

Answer 1

+f

Question 2

focal point +/-
converging lens

Answer 2

+f

Question 3

focal point +/-
convex mirror

Answer 3

-f

Question 4

focal point +/-
diverging lens

Answer 4

-f

Question 5

di, hi, M +/-
upright virtual image

Answer 5

-di
+hi
+M

Question 6

di, hi, M +/-
real, inverted image

Answer 6

+di
-hi
-M

Question 7

size of image from concave mirror

Answer 7

larger unless farther
(smaller when do>2f)

Question 8

size of image from converging lens

Answer 8

larger unless farther
(smaller when do>2f)

Question 9

size of image from convex mirror

Answer 9

always smaller

Question 10

size of image from diverging lens

Answer 10

always smaller

Question 11

orientation of image from concave mirror

Answer 11

inverted unless closer
(upright when do<f)

Question 12

orientation of image from converging lens

Answer 12

inverted unless closer
(upright when do<f)

Question 13

orientation of image from convex mirror

Answer 13

always upright

Question 14

orientation of image from diverging lens

Answer 14

always upright

Question 15

what happens when do=f

Answer 15

no image

Question 16

what happens when do=2f

Answer 16

real, inverted image
same size as object