Question

b. The radio is a source of energy.​

Answer 1

Radio source, in astronomy, any of various objects in the universe that emit relatively large amounts of radio waves. Nearly all types of astronomical objects give off some radio radiation, but the strongest sources of such emissions include pulsars, certain nebulas, quasars, and radio galaxies.

Answer 2

Electromagnetic energy

• Any of the different things in the universe that release relatively big amounts of waves of radio are referred to as a radio source.
• To create waves of sound, these devices receive waves of radio and transform them into mechanical vibrations in the speaker.
• Radios, televisions, cell phones, and wireless computer networks are examples of radio-wave-based technology that benefit humans.
• Electromagnetic radiation includes waves of radio, gamma rays, visible light, and all other components of the electromagnetic spectrum.