Question

write the formula for what is meant by magnification of a lens what does the negative sign of magnification represent​

Answer 1

Answer:

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Explanation:

The sign of magnification indicates nature of image, i.e.,

Negative sign indicates image to be inverted and real.

Positive sign indicates image to be erect and virtual.

Answer 2

Magnification of a lens means -

The enlargement of the image with respect to the size of the object is magnification.

Magnification of lens is the ratio of the height of the image to the height of the object.

Alternatively, magnification of lens can also be found by taking the ratio of the image distance to the object distance.

The formula for magnification is written below:

$Magnification = \frac{h_{i} }{h_{o} }$; where,

${h_{i} = height\:of\:image }\\ {h_{o} = height\:of\:object$

OR

$Magnification = \frac{v }{u }$; where,

${v = distance\:of\:image }\\ {o= distance\:of\:object$

Negative sign of magnification represents the following:

The image is real and inverted. Real and inverted image has negative sign as it is always formed below the principal axis of the lens.