Magnification is the ratio of of an image a)enlargement b)reduction c)both a and b d)none of the above

Magnification is the ratio of enlargement and reduction of an image

Explanation:

Magnification is the way of enlarging the apparent size of an object. When the magnification of an object is less than 1 it shows reduction in size while when it is greater than 1, it shows enlargement in size. Mathematically, it is given by :

i.e.

Hence, the correct option is (c) " both a and b " i.e. " enlargement and reduction ".

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

the circumference of the solar disc is 4375246 km, nearly.

explanation: