If the magnification of a body of size $1\, m$ is $2$,what is the size of the image (in $m$)?

The mirror formula is the same,irrespective of whether the mirror is a convex mirror or a concave mirror.

$A$ student focussed the image of a candle flame on a white screen using a convex lens. He noted down the position of the candle,screen,and the lens as under:
Position of candle $= 12.0\, cm$
Position of convex lens $= 50.0\, cm$
Position of the screen $= 88.0\, cm$
$(i)$ Where will the image be formed if he shifts the candle towards the lens at a position of $31.0\, cm$?
$(ii)$ What will be the nature of the image formed if he further shifts the candle towards the lens?
$(iii)$ Draw a ray diagram to show the formation of the image in case $(ii)$ as said above.

Which of the following statements about light waves is $NOT$ correct?

Where should an object be placed in front of a concave mirror to obtain an inverted and magnified image?

On what factor does the lateral shift produced by a glass slab depend?