Question

describe the nature of image formed an object is placed at a distance of 30 CM from a convex lens of focal length 15cm

Answer 1

here U is object distance ,
V is image distance,
F is focal length

ACCORDING To LENS FORMULA

$1 \div f = 1 \div v - 1 \div u$

1/15=1/v- (-1/30)

= 1/v=1/30+1/15

= 1/ v=(1+2)/30
= 3/30
= 1/10
= v=10cm


focal length is positive for convex lens
object distance is always negative

Answer 2

Answer: Real and inverted.

Explanation: