Question

What is mean by magnification produce by spherical mirror? State the formula

for it and state when positive and negative magnification produce by spherical

mirror.

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Answer 1

Answer:

The magnification, m produced by a spherical mirror can be expressed as: m=h′h where h′ is height of image and h is height of object. It is also equal to the negative of the ratio of the image distance(v) to object distance (u). m=−vu. According to convention object distance is always negative

Answer 2

$\large \sf {\red{magnification }}\:$

Magnification is defined as the ratio of height of image to the height of object. Magnification is represented by letter "m".

$\large \sf { \green{ \: formulas \: regarding \: magnification }}\:$

If "h" is the height of the object and "h'" is the height of image given by lens magnification produced by a lens is given by:

$\sf{ \orange{m = \frac{Height \: of \: image }{Height \:of \: object}}}$

Magnification produced by a lens is also related to the object distance "u" and image distance "v". This relation is given by:

$\sf{ {m = \frac{h}{h'} = \frac{v}{u} }}$

$\sf{ \green {sign \: convention}}$

• Height of images

1. Positive for virtual images.
2. Negative for real images.

Also,

• A negative sign in the value of the magnification indicates that image is real.
• A positive sign in the value of the magnification indicates that the image is virtual.

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