PATHFINDER VIDEO SOLUTIONS | CYLINDRICAL LENS | OPTICS | CHALLENGE-1 | JEE ADVANCED SCHOOL PHYSICS
Channel: PHYSICS SIR JEE - JANARDHAN - IIT JEE & OLYMPIAD
Date: 2020-10-12

WHAT'S THE BEST WAY TO VISUALISE AND DIFFERENTIATE A CYLINDRICAL LENS FROM A SPHERICAL ONE ?
Q : A cylindrical rod made of so1ne unknown glass is placed on a ruled white paper of a common exercise book . If axis of the rod makes an angle   with the ruled lines, the lines will appear broken and tilted at some angle a as shown in the figure. 
 (a) Explain this appearance of the ruled lines shown.
 (b)Find refractive index of the glass, assuming the rod not to be thick and lines are being observed fro1n a height vertically above the rod.

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