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CBSE Class 10 Answered

what is linear magnification?
Asked by maneksingh31 | 25 Aug, 2010, 12:00: AM
answered-by-expert Expert Answer

Linear magnification is ratio of the size of the image to the size of the object.

We know,

Concave Mirror

For Real Image

using sign convention

AlBl = -h2 ; AB = +h1

PBl = -V, PB = - u

For Virtual Image

AlBl = +h2 ; AB = h1

PBl = +V ; PB = -u

Convex Mirror

AlBl = +h2 ; AB = +h1

PBl = +v ; PB = -u

Note:

If m>1, image is enlarged.

If m <1, image is diminished.

If m is +ve , image is erect and virtual.

If m is -ve, image is inverted and real.

Other formulae for magnification

or

Answered by | 26 Aug, 2010, 02:50: PM

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