Question

1. an object 5cm high forms a virtual image of 1.25cm high, when placed in front of aconvex mirror at a distance of 24 cm.calculate:a.the position of the image b.the focal length of the mirror
2. an object forms a virtual image 1/8 the of the size of the object. if the object is placed at a distance of 40cm from the convex mirror, calculate:
a.the position of the image
b.the focal length of the convex mirror

Answer 1

object size (h)=5 cm

Image size(h')=1.25 cm

object distance(u) =-24cm

we know ,

h'/h = -v/u

1.25/5=-v/-24

v=6cm

using mirror formula

1/v + 1/u =1/f

1/6-1/24=1/f

1/f =1/8

:.f=8 cm

Answer 2

Answer:

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