A candle is 49.0 cm in front of a convex spherical mirror of radius of curvature 70.0 cm. What are the image distance and the magnification, respectively?
The answer is: -20.0 cm, +0.417. Can anyone show me how to approach this question.
The answer is: -20.0 cm, +0.417. Can anyone show me how to approach this question.
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1/ do + 1/di = 1/f
do = 49 cm
di - our unknown
f = - 35 cm ( f i negative for convex mirrors)
1/49 + 1/di = 1/(-35) ===> di = -20.4 cm
Magnification = (I di I) / do =( I -20.4 I ) / 49 = (20.4)/(49) = 0.417
do = 49 cm
di - our unknown
f = - 35 cm ( f i negative for convex mirrors)
1/49 + 1/di = 1/(-35) ===> di = -20.4 cm
Magnification = (I di I) / do =( I -20.4 I ) / 49 = (20.4)/(49) = 0.417