Question

a) If the image formed by a lens is diminished in size and erect,for all positions of the

Object,what type of lens is it?


b)Name the point on the lens throughwhich a ray of light passes undeviated.


c)An object is placed perpendicular to the principal axis of a convex lens of focal

length 20cm.The distance of the object from the lens is 30cm.Find the position,The

magnification and the nature of the image formed.
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Answer 1

Answer:

a) if diminished and erect then its convex lens

Explanation:

b) the light passes undeviated if the light passes through the origion of the lens.

c)us formula 1/f =1/v - 1/u