Question

The magnification of an object placed at a distance of 6cm in front of a concave mirror is -3. it means..................​

Answer 1

◕ Solution :-

As per the given data ,

• Magnification = - 3

➥ Here , the negative sign denotes that the image is formed below the principal axis

➥ Hence , the image formed is real , inverted and magnified

If ,

• Magnification = + 3

➥ Here , the positive sign denotes that the image is formed above the principal axis

➥ Hence , the image formed is virtual , erect and magnified

◕ Extra information :-

• Distances are always measured from the pole of the mirror
• The focal length of convex mirror is positive

• The focal length of concave mirror is negative

◈ Mirror formula

➽ 1 / f = 1 / v + 1 / u

◈  Lens formula

➽ m = - v / u = hi / ho