Question

(a) Why magnification is taken negative for real images and positive for virtual images?

(b) Why convex mirror is used in rear view mirrors and not concave mirror?​

Answer 1

Answer:

Hi baby, ye btao kaisi ho or kaise kt rhe hai din:)

Answer 2

Hello Mate! Here is your answer:

a. Magnification tells us how magnified the image is. Suppose I take 'u' as Object Distance and 'v' as Image Distance. For real images, both u and v are negative and putting them into the formula of magnification, we get,

= -(-v/-u)

= Magnification as Negative.

Now, for virtual images, u is negative but v is positive. So,

= -(v/-u)

= Magnification as Positive.

b. Convex mirrors are used as a rear view mirror because it gives us a wider field of view. In simple words, we can see to a much larger extent. However, in concave mirrors, it doesn't give wide view field.

I hope this helps.