Question 8.4: A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength?
Class 12 - Physics - Electromagnetic Waves Electromagnetic Waves Page-286
Answers
Answered by
3
Given,
The electromagnetic wave travels in vacuum along z-direction. then , electirc field vector and magnetic field vector will be in XY plane.
Frequency of the wave = 30 MHz
Converting into Hz, v = 30× 10^6 Hz.
speed of light , c = 3 × 10^8 m/s
Wavelength of the wave can be calculated using the following relation:
λ = c/v
⇒ λ = 3 × 10^8/30 × 10^6
⇒λ = 10 m
The electromagnetic wave travels in vacuum along z-direction. then , electirc field vector and magnetic field vector will be in XY plane.
Frequency of the wave = 30 MHz
Converting into Hz, v = 30× 10^6 Hz.
speed of light , c = 3 × 10^8 m/s
Wavelength of the wave can be calculated using the following relation:
λ = c/v
⇒ λ = 3 × 10^8/30 × 10^6
⇒λ = 10 m
Similar questions