Respuesta :
The correct answer is option d
The radio waves are the type of electromagnetic waves which was used by Heinrich Hertz in 1887s to support the idea that light has dual nature, the wave nature and the particle nature.
He supported the work of Maxwell's hypothesis in which he said that if Maxwell's predictions were right then the EM waves would be transmitted through the space at the speed of light but in the form of waves.
To support this hypothesis many experiments were conducted and ultimately it was concluded that the light travels in the form of waves(radio).
