Batteries May Power Future Of Auto Industry Morgan Stanley Team, Morgan Stanley For some years now, many industry watchers have predicted the demise of traditional gas-guzzlers and the rise of electric cars. Yet, despite the advent of hybrid vehicles, better and cheaper batteries, and the entry of high-performance luxury electric competitors, the former continues to dominate roads globally.
Radiant energy is energy that travels by waves or particles, particularly electromagnetic radiation such as heat or x-rays. An example of radiant energy is the source of energy used in radiation therapy.
If the energy source is a warm object, like the sun, some of the  thermal energy is transferred as a type of EMR called infrared  radiation (IR) or 'heat radiation'.  Properties (characteristics) of Radiant Energy are:   Waves of radiant energy can travel in a vacuum.