Question

Give mathematical formula for determining magnification produced by the spherical mirror. What does m= -1 signify? Identify the mirror that can produce it.

Answer 1

-v÷u=m
height of image ÷ height of object= m
m=-1 signifies that the image is real , inverted and same size of the object. concave mirror produce image of same size when object is at centre of curvature.

Answer 2

Explanation:

• The mathematical formula for determining the magnification produced by the spherical mirror is given by :

$m=\dfrac{-v}{u}=\dfrac{h'}{h}$

v is image distance

u is object distance

h' is height of image

h is height of object

• Magnification, m = -1 signifies the formed image is real, inverted and of the same size as that of the object.
• Since, convex mirrors produce erect and diminished images and a concave mirror can form both erect and inverted images. So, the mirror is concave mirror.

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