A concave mirror (f 1 = 14.6 cm) and a convex mirror (f 2 = ?6.70 cm) are facing
ID: 1373190 • Letter: A
Question
A concave mirror (f1 = 14.6 cm) and a convex mirror (f2 = ?6.70 cm) are facing each other and are separated by a distance of 34.0 cm. An object is placed between the mirrors and is 17 cm from each mirror. Consider the light from the object that reflects first from the concave mirror and then from the convex mirror. What is the distance of the image (di2) produced by the convex mirror A concave mirror (f1 = 14.6 cm) and a convex mirror (f2 = ?6.70 cm) are facing each other and are separated by a distance of 34.0 cm. An object is placed between the mirrors and is 17 cm from each mirror. Consider the light from the object that reflects first from the concave mirror and then from the convex mirror. What is the distance of the image (di2) produced by the convex mirrorExplanation / Answer
Note that
1/f = 1/do + 1/di
where
f = focal length = 14 cm
do = object distance = 17.6 cm
di = image distance
Thus, solving for di,
di = 68.44444444 cm
which is actually projected at the back of the convex mirror, 35.2 - 68.44 = -33.344 cm = do.
Thus, note that
1/f = 1/do + 1/di
where
f = focal length = -5.6 cm
do = object distance = -33.244444 cm
di = image distance
Thus, solving for di,
di = -6.73 cm
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