COMEDK2024PhysicsElectromagnetic Waves
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2 10¹⁰ ~Hz and amplitude 48 ~V / m . The wavelength of the wave is
Options
- A24 10⁻¹⁰ ~m
- B1.5 10⁻² ~m
- C4.16 10^8 ~m
- D3 10^8 ~m
Correct answer
B. 1.5 10⁻² ~m
Step-by-step solution
Here, speed of electromagnetic wave in vacuum/air, c=3 10^8 ~m / s Frequency, f=2 10¹⁰ ~Hz As we know, wavelength, aligned & = c f = 3 10^8 2 10¹⁰ & =1.5 10⁻² ~m aligned