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Question 10: NCERT Solutions for 12th Class Physics: Chapter 8-Electromagnetic Waves
In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of 2.0 × 1010 Hz and amplitude 48 Vm-1.
(a) What is the wavelength of the wave?
(b) What is the amplitude of the oscillating magnetic field?
(c) Show that the average energy density of the E field equals the average energy density of the B field, [c = 3 × 108 m s-1.]
Solution:
(a) Wavelength of electromagnetic wave is
(b) Amplitude of magnetic field,
(c) Energy density as electric field,
Check the complete chapter with solutions.
NCERT Solutions for 12th Class Physics: Chapter 8-Electromagnetic Waves