A needle 4 cm high is placed in front of a lens. Image of the needle is real, inverted and 6 cm high, when the distance between the needle and its image is 20 cm. find the focal length of lens and also write the type of the lens.
Answers
Answered by
18
+20 is the focal length of the lens.focal is +ve so it,s a convex lens.
Attachments:
raftaar227:
right or wrong
Answered by
1
Answer:
24cm and it is a CONVEX lens
Similar questions