Electromagnetic Waves and Their Applications 
Explanation:
- FM Radio Broadcast: Uses radio waves in the meter range, allowing transmission over long distances.
- Detection of Bone Fractures: Uses X-rays as they can penetrate soft tissues but are absorbed by bones, creating images.
- Treatment of Muscular Strain: Uses infrared rays to provide deep tissue heating and pain relief.
A parallel plate capacitor made of circular plates each of radius R = 6.0 cm has a capacitance C = 100 pF. The capacitor is connected to a 230 V ac supply with a (angular) frequency of 300 rad s−1.

What physical quantity is the same for X-rays of wavelength \(10^{−10} m\), red light of wavelength \(6800 Å\) and radio waves of wavelength \(500\ m\)?
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?
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
A charged particle oscillates about its mean equilibrium position with a frequency of \(10^9 Hz\). What is the frequency of the electromagnetic waves produced by the oscillator?