a convex lens produces an image of an object on a screen with a magnification of 1/2.When the lens is moved 30 cm away from the object , the magnification of the image is 2.The Focal length of the lens is
1) 20 cm
2) 25 cm
3) 30 cm
4) 35 cm
Answers
Answered by
0
Answer:
3-30 cm fzgushsvdushs
Answered by
1
Answer:
find answer in doubtnut
Similar questions