※ 引述《vvvv9999 (龍方大隊長)》之銘言：
: An object is placed in front of a convex mirror at the distance at the
: distance of 30.0 cm.Find the distance between the image abd the mirror and
: the lateral magnification if the focal distance of the mirror is 20.0cm
: (a)12 cm and +0.4 (b)12 cm and -0.4 (c)60cm and +2.0 (d)60cm and -2.0
: (e)15 cm and +0.5
: 第一個應該是算q 1/30+1/q=1/20 q=60
: 請問第二個是要算什麼呢@@
答案應該是a
凸面鏡的f要代負的
所以可求得q=-12(因為是虛像)
M=-q/p=h'/h=+0.4
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