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
19 views
in Physics by (86.4k points)
closed by
A prism having refractive index `sqrt2` and refractive angle `30^@` has one of the refractive surfaces polished. A beam of light incident on the other surfaces will trace its path if the angle of incidence is
A. `0^@`
B. `30^@`
C. `45^@`
D. `60^@`

1 Answer

0 votes
by (84.0k points)
selected by
 
Best answer
Correct Answer - C
If beam retraces its path, for this, ray must be incident normally on silvered surface.
image
`1xxsini=musin30^@`
`sini=sqrt2xx1//2=1/sqrt2=sin45^@`
`i=45^@`

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

...