Physics · 2021
JEE Main · 24 February 2021, Shift 2 · Q29
An electromagnetic wave of frequency 3 GHz enters a dielectric medium of relative electric permittivity 2.25 from vacuum. The wavelength of this wave…
An electromagnetic wave of frequency $\displaystyle 3$ GHz enters a dielectric medium of relative electric permittivity $\displaystyle 2.25$ from vacuum. The wavelength of this wave in that medium will be
\_\_\_\_ $\displaystyle \times 10^{-2} \mathrm{~cm}$.
Official answer
667
More from Electromagnetic Waves
- The electric field in an electromagnetic wave is given by E=56.5 sin ω(t-x / c) NC^-1. Find the intensity of the wave if it is propagating along x…2022
- The equation of the electric field of an electromagnetic wave propagating through free space is given by: E=√377 sin (6.27 × 10^3 t-2.09 × 10^-5 x) N…2026
- Given below are two statements: Statement I: A time varying electric field is a source of changing magnetic field and vice-versa. Thus a disturbance…2022
- Choose the correct answer from the options given below:2026
- A point source of light is placed at the centre of curvature of a hemispherical surface. The source emits a power of 24 W. The radius of curvature of…2023
- Which of the following Maxwell's equation is valid for time varying conditions but not valid for static conditions:2023
- Arrange the following in the ascending order of wavelength (λ): Microwaves (λ_1) Ultraviolet rays (λ_2) Infrared rays (λ_3) X-rays (λ_4) Choose the…2025
- Match List-I with List-II: Choose the correct answer from the options given below:2024
JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.