Linear magnifications of about 10 5 to 10 6 are attained.
2.
Linear magnification " M " is not always the most useful measure of magnifying power.
3.
Further, the linear magnification of the shadow image can be got from the perpendicular distances from the wall of the source and object-if these are x and y respectively, the magnification is x / ( x-y ).
4.
When taking a picture of the moon using a camera with a 50 mm lens, one is not concerned with the linear magnification / = . } } Rather, the plate scale of the camera is about 1?/ mm, from which one can conclude that the 0.5 mm image on the film corresponds to an angular size of the moon seen from earth of about 0.5?
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