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a tooth with a height of 2cm is set 4cm in front of a convex mirror....

a tooth with a height of 2cm is set 4cm in front of a convex mirror. if the image is 7cm tall, is virtual and not inverted, the focal longitude of the mirror is:

answer choices
16/3
13/2
28/5
30/4
25/3
15/4
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Answer #1

hight of object = ho=2cm hight of Image =hi = 7cm of object: do = of Image=di = - 4cm distance distance Magnification - m = -

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