A magnifying glass is to be used at the fixed object at a distance of distance of 1 inch. lf it is to produce an erect image magnified 5 times. Its focal length should be
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
0.2 inch
b
0.8 inch
c
1.25 inch
d
5 inch
answer is C.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
m=vu=5⇒v=5 inch given u=1 inchUsing sign convention u=−1 inch, v=−5 inch∴1f=1v−1u=1−5−1−1⇒f=1.25 inch
A magnifying glass is to be used at the fixed object at a distance of distance of 1 inch. lf it is to produce an erect image magnified 5 times. Its focal length should be