Question

Magnification of a mirror is -3 what do you mean by this ? Write the nature of the spherical mirror

Answer 1

Answer:

magnification is -3...

negative sign shows that the image is inverted

and the number 3 shows that the image size is three times of the object size.

since the image is enlarged and inverted => image is real => given spherical mirror is a concave mirror.

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Answer 2

Answer:

magnification is negative the image is smaller then object

Explanation:

p=1/f (in meter)

so focal length = -3f = 1

f=1/-3

f= -0.3333

in cm = f= -33.33

nature = convex mirror. diminished