When a star explodes, does their energy only reach Earth by the light that they transmit? How much energy does one star give off when it explodes and how much of that energy hits Earth? What happens to that energy?
No, up to
The energy from a star exploding reaches earth in the form of all kinds of electromagnetic radiation, from radio to gamma rays.
A supernova can give off as much as
As the energy travels away from the star, it becomes more spread out and so weaker at any particular spot. Whatever does get to the Earth is greatly reduced by the Earth's magnetic field.