Answers
- . The frequency and wavelengths both depend on each other. The lower the frequency, the longer the wavelength, and the lower the energy. The higher the frequency, the shorter the wavelength, and the higher the energy.
- . Because of their properties to transmit information without the use of wires across distances and their ability to pass through most objects. Their frequency ranges do not harm humans and are therefore safe for everyday communications.
- . Radio waves play a major role in radios and TV broadcasting.
- . Radio waves travel the longest distances and can pass through objects, microwaves carry more information but cannot pass through solid objects, infrared waves are short and direct ranged.
- . Because they both are dangerous towards human beings because of their higher frequency which damage cells. As communication systems are used by many people daily, it is harmful to be overexposed to these rays.