Question

the focal length of a convex lens is 18 cm and the size of the image is a quarter of the object. the object is situated at a distance of? pls give full understandable solution pls

Answer 1

hope It helped you and please mark it as brainalist if you liked it... no

Answer 2

f=+18cm(virtual image)

v=-u/4(because u is always negative)

Putting value in mirror formula,

1/f=1/v+1/u

1/18=4/-u + 1/-u

1/18=-5/u

18=u/-5

u=-90cm