Question

A 5 cm tall object is placed at a distance of 30 cm from a convex mirror of focal length 15 cm.Find the position,size and nature of the image formed
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Answer 1

Answer:

In convex mirror h1= +5

object distance (u)= -30

focal length (f)=+15

To find image distance (v),

By mirror formula,

1/F = 1/V +1/U

1/15= 1/V + 1/(-30)

1/15 +1/30 =1/V

2+1/30 = 1/V

3/30=1/10 = 1/V

[V = 10]

virtual image and form behind the mirror.

TO FIND NATURE,

We will find h2

( h2/h1 = -v/u) formula

h2/5 = -10/-30

h2/5= 1/3

h2 = 1/3 × 5

[h2= +1.66]

h2 is positive so image will be ERECT and VIRTUAL.

Answer 2

Answer:

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Explanation:

u= -30cm and f=15cm. We get v as +10cm. Positive sign indicates that it is a virtual image. Therefore size of image would be 5/3 cm