a lens is placed between a lamp and a screen which are 18 cm apart, so that the image on the screen is three times as large as the lamp. the distance between the lamp and the lens is?
Answers
Answered by
1
use the magnification taking it as 3 and then use it's formula that is -v/u
devashishChandra:
you are wrong please recall that magnification of lens is v/u not as _v/u
I didn't indicated minus it was just as a line for separation
Is it's answer 4.5
ok
Similar questions