Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

JEE Class main Answered

solve
question image
Asked by adjacentcalliber10 | 07 May, 2019, 10:13: AM
answered-by-expert Expert Answer
If the reflected ray gets deviation θ, then mirror has turned an angle θ/2 .
 
Let t is the time taken by light ray starting from rotating mirror and getting reflected by fixed mirror
and then again reflected by roataing mirror.
 
In this time t light travelled a distance 2D with speed c ,  hence  t = 2D/c  ...................( 1)
 
since mirror has turned an angle θ/2 in time t, its angular velocity ω = θ/(2t)  ...............(2)
 
since ω = 2πf , where f is frequency of rotation of mirror, then we have   2πf = θ/(2t)    or   t = θ/(4πf)  ...............(3)
 
By equating (1) and (3), we get,   c = 8πfD/θ
Answered by Thiyagarajan K | 07 May, 2019, 05:01: PM

Application Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
JEE main - Physics
a non flow quasi Statics proces occur for which P =(-3V+16)bar where V in volume in m³ what will the work done when V changes to 2m³ to 6m³
Asked by pataiyalalit02 | 19 May, 2024, 04:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
1 question solution
question image
Asked by chaudharyrakesh10312 | 19 May, 2024, 02:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
solution?
question image
Asked by amanniju2 | 17 May, 2024, 09:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
if the radius of the earth sinks by 1% and its density remain constant then what is the change in value of acceleration due to gravity of earth at its surface. Please solve it by using error concept, I have a little confusion in it.
Asked by srkgb8018 | 15 May, 2024, 08:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
find the value of
question image
Asked by sohan123asiwal | 12 May, 2024, 05:52: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
point object is placed at a distance d from a convex lens of focal length 10 cm. If a plane mirror were put perpendicular to principal axis of lens at distance of 25cm form it , what are the values of d so that the image forms at the point object
Asked by pranav10022007 | 12 May, 2024, 10:05: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
please answer
question image
Asked by anupriya23102006 | 09 May, 2024, 04:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
sir, can you please explain this question in detail, im bit new to this concept
question image
Asked by ashwinskrishna2006 | 07 May, 2024, 05:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
If the surface of a sphere is completely reflecting then radiation force in the sphere is
question image
Asked by srkgb8018 | 05 May, 2024, 10:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
JEE main - Physics
doubt
question image
Asked by pkp7734825 | 04 May, 2024, 10:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×