Question

write nature and size of the image when magnification is negative and its ratio is less than 1 .also state which mirror is used​

Answer 1

Answer:

Magnification is given by the ratio of image size to the object size m=IO . Cartesian sign conventions say that when the ratio is positive, the image is virtual and erect. When the ratio is negative the image is real and virtual.

Complete step-by-step answer

Magnification can be defined as the ratio of size of the image to the size of the object. It is denoted by m.

m=IO

For example

This magnification can tell us about the nature of the image based on the sign itself. If the ratio is negative then the image is real and inverted. If the ratio is positive then the image is virtual and erect.

So, according to these sigh conventions, when the magnification is positive then the image has to be erect and virtual.