JEE PYQ: Electromagnetic Waves Question 8
Question 8 - 2021 (24 Feb 2021 Shift 2)
An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave in that medium will be ______ $\times 10^{-2}$ cm.
Show Answer
Answer: 667
Solution
$\lambda = \frac{c}{f\sqrt{\mu_r \epsilon_r}} = \frac{3 \times 10^{8}}{3 \times 10^{9} \times \sqrt{2.25}} = 667 \times 10^{-2}$ cm.
BETA
