Let's summarise mirror formula, magnification formula, and sign conventions. And use them to solve NCERT probelm 14 & 15

NCERT problem 14 - Chapter 'Light' (Class 10)
An object 5.0 cm in length is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position of the image, its nature and size.

NCERT problem 13 - Chapter 'Light' (class 10)
An object of size 7.0 cm is placed at 27cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed, so that a sharp focussed image can be obtained? Find the size and the nature of the image.

Timestamps:
00:00 Mirror & magnification formula
1:57 Sign conventions
3:00 NCERT problem 15 (Concave mirror)
5:15 NCERT problem 14 (Convex mirror)

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