Q4 of 117 Page 10

What does the negative sign in the value of magnification produced by a mirror indicates about an image?

we know,


If the height of the object is positive and the height of image is negative the magnification will be negative. So, negative sign in value of magnification indicates that image is real and inverted because a real image has always negative height i.e. real image is formed below principal axis.

More from this chapter

All 117 →
2

The magnification produced by a plane minor is +L What does this mean ?

 3

Find the power of a concave lens of focal length 2 m.

 5

Given below are refractive indices of a few material media.

Rock salt - 1.54


Ice - 1.31


Dense flint glass - 1.65


Crown glass - 1.52


Arrange the media in the ascending order of optical density.

 6

Define 1 Dioptre of power of a lens.