1.A candle is placed 13.21 cm in front of a convex mirror. When the convex mirro
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Question
1.A candle is placed 13.21 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 7.0 cm farther away from the mirror. Find the focal length of the convex mirror.
2.An object is placed at a known distance in front of a mirror whose focal length is also known. You apply the mirror equation and find that the image distance is a negative number. This result tells you that __________
3.Suppose you stand in front of a spherical mirror (concave or convex). Is it possible for your image to be (a) real and upright (b) virtual and inverted?
Explanation / Answer
1.to calculate focal length
using formula-f=1/(1/a+1/a')
a=13.21cm
a'=7.0cm
f=1/(1/13.21+1/7.0)
f=4.76cm
2.the image is virtual
3.a concave mirror can form a real, inverted image or virtual upright image
a convex mirror can only form a virtual upright image
(a) therefore it is not posible for your image to be real and upright
(b) similarly,it is not possible for your image to be virtual and inverted
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