LIVE Course for free

Rated by 1 million+ students
Get app now
JEE MAIN 2023
JEE MAIN 2023 TEST SERIES
NEET 2023 TEST SERIES
NEET 2023
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
37 views
in Physics by (86.4k points)
closed by
Two polaroids are placed in the path of unpolarized beam of intensity `I_(0)` such that no light is emitted from the second polarid. If a third polaroid whose polarization axis makes an angle `theta` with the polarization axis of first polaroid, is placed between these two polariods then the intensity of light emerging from the last polaroid will be
A. `(I_(0)/8) sin^(2) 2theta`
B. `(I_(0)/4) sin^(2) 2theta`
C. `(I_(0)/2) cos^(4) theta`
D. `I_(0) cos^(4) theta`

1 Answer

0 votes
by (84.0k points)
selected by
 
Best answer
Correct Answer - A
image
`I_(2)=I_(1) cos^(2) theta=I_(0)/2 cos^(2) theta`
`I_(3)=I_(2) cos^(2) (90-theta)=I_(0)/2 cos^(2) theta sin^(2) theta`
`=I_(0)/8(2 sin theta cos theta)^(2)=I_(0)/8(sin 2theta)^(2)`

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...