Search any question & find its solution
Question:
Answered & Verified by Expert
A cubical vessel has opaque walls. An observer (dark circle in figure below) is located such that she can see only the wall CD but not the bottom. Nearly to what height should water be poured so that she can see an object placed at the bottom at a distance of $10 \mathrm{~cm}$ from the corner $\mathrm{C}$ ? (Refractive index of water is $1.33$.
Options:
Solution:
1013 Upvotes
Verified Answer
The correct answer is:
$27 \mathrm{~cm}$
$\mu \sin i=1 \cdot \sin 45^{\circ}$
$\frac{4}{3} \sin i=\frac{1}{\sqrt{2}}$ $\frac{4}{3} \frac{y-10}{\sqrt{(y-10)^{2}+y^{2}}}=\frac{1}{\sqrt{2}}$ $y=27$ (approximate calculation)
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.