Question

An object is kept at a distance of 5m in front of a spherical mirror, which forms its erect image at a distance of 2m from the mirror. What is the magnification? Is the mirror concave or convex?






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Answer 1

Given:-

An object is kept at a distance of 5m in front of a spherical mirror, which forms its erect image at a distance of 2m from the mirror.

• Object distance (u)=5cm
• Image distance (v)=2m
• Image formed is errect.

To Find:-

• Magnification of the mirror(m)
• Mirror is Concave or Convex.

Solution:-

According the question

Image formed is Erect.

Which means the image is virtual

Then we use the magnification formula

• m= -v/u

So we will substitute the value in this equation

⇒ m= -2/-5

⇒ m= 2/5

⇒ m= 4

Therefore, magnification of a mirror is 4 cm.

Which is positive So, the mirror is Convex.

☆Hope it helps You☆

Answer 2

Answer:

object distance =u=5cm

image distance=2cm

magnification=-v/u

-21/-5

-4 m