Search any question & find its solution
Question:
Answered & Verified by Expert
A boat has green light of wavelength $\lambda=500 \mathrm{~nm}$ on the mast. What wavelength would be measured and what colour would be observed for this light as seen by a diver submerged in water by the side of the boat?
Given, $\mathrm{n}_{\mathrm{w}}=\frac{4}{3}$.
Options:
Given, $\mathrm{n}_{\mathrm{w}}=\frac{4}{3}$.
Solution:
2077 Upvotes
Verified Answer
The correct answer is:
Blue of wavelength $376 \mathrm{~nm}$
When light travels from rarer to denser medium its wavelength reduces. Wavelength in water $=\frac{\lambda_{\mathrm{a}}}{\mu_{\mathrm{w}}}$
$$
=\frac{500}{(4 / 3)}=375 \mathrm{~nm} \approx 376 \mathrm{~nm} \text { (Blue colour) }
$$
$$
=\frac{500}{(4 / 3)}=375 \mathrm{~nm} \approx 376 \mathrm{~nm} \text { (Blue colour) }
$$
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.