Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A convex lens has power . It is cut into two halves along its principal axis. Further one piece (out o

A convex lens has power \mathrm{P}. It is cut into two halves along its principal axis. Further one piece (out of the two halves) is cut into two halves perpendicular to the principal axis (as shown in figures). Choose the incorrect option for the reported pieces.

Option: 1

\mathrm{\text{Power of}\, \, L_{1}= \frac{P}{2}}


Option: 2

\mathrm{\text{Power of}\, \, L_{2}= \frac{P}{2}}


Option: 3

\mathrm{\text{Power of}\, \, L_{3}= \frac{P}{2}}


Option: 4

\mathrm{\text{Power of}\, \, L_{1}= P}


Answers (1)

best_answer


Len's maker's formula.
\mathrm{P= \frac{1}{f}= \left ( \frac{\mu_g}{\mu_m}-1 \right )\left ( \frac{1}{R_{1}}-\frac{1}{R_{2}} \right )}

For convex Lens
\mathrm{R_{1}= +R,\: R_{2}= -R}
\mathrm{P= \left ( \frac{\mu_g}{\mu_m} -1\right )\left ( \frac{2}{R} \right )}.

for \mathrm{L_{1},R_{1} \& R_{2}} remain the same as the original Lens

\mathrm{\therefore }  even after cutting,
\mathrm{L_{1} } , power will be the same as \mathrm{P }. (original Lens). & for \mathrm{L_{2} \, \&\, L _{3} } power become half.

The correct answer is (1)
 

Posted by

Rishi

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

AESL expands Aakash Digital 2.0 to offer AI-powered coaching for NEET, JEE, Olympiads
anam-khan

Bihar Board extends BSEB Super 50 free coaching application last date to March 26
anam-khan

JEE Main City Intimation Slip 2025 Live: NTA session 2 exam city slips soon at jeemain.nta.nic.in

Latest Question