Question

Obtain the image of the flame of a candle by a concave mirror on a screen study the nature and size of the image of candle flame by varying the distance of the candle form the mirror

Answer 1

Magnification is 3 times and image distance v=80cm

Magnification =

u

v

Or,3=

u

80cm

Or, u=

3

80cm

since,object distance is taken as negative; as per sign convention so,

or, u=−

3

80cm

Nature of image: since image is formed on the other side of lens hence it is a real image and inverted image.

Nature of Lens: Enlarged image is formed by convex lens and not by concave lens, so it is a convex lens.