Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert
A glass slab of thickness $t$ and refractive index $\mu$. Calculate the time taken by light to travel this thickness.
PhysicsRay OpticsMHT CETMHT CET 2010
Options:
  • A $t \mu c$
  • B $\frac{t c}{\mu}$
  • C $\frac{t}{\mu c}$
  • D $\frac{\mu t}{c}$
Solution:
1512 Upvotes Verified Answer
The correct answer is: $\frac{\mu t}{c}$
Time taken by light ray to pass through glass slab $=\frac{\mu t}{c}$
where $\quad t=$ geometrical path $\mu t=$ optical path

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.