Question

Q1=. A convex lens forms an inverted image of size same
as that of the object which is placed at a distance
60 cm in front of the lens. Find :
(a) the position of image, and
(b) the focal length of the lens
Q2=
A concave lens forms an erect image of 3rd size
of the object which is placed at a distance 30 cm
in front of the lens. Find :
(a) the position of image, and
(b) the focal length of the lens.
Ans. (a) 10 cm infront of the lens, (b) 15 cm (negative)​

Answer 1

Answer:

answer1=(a) 60 cm behind the lens

(b) 30 cm

answer 2=(a)10 cm in front of lens

(b)15 cm (neg)

Answer 2

Answer:

mai sabko bhai hi bolti hu ok

bhai