Explains what happens when the sunlight reaches Earth, how its energy is stored in fossil fuels, how this energy is then released in power stations and used to generate electricity which is used to make light, and finally how this light is used to make a movie.

A Capstone Interactive eBook.

What is energy? -- Ever-changing energy -- What is the most important energy sources on earth? -- Why is sunlight from the past still important today? -- How do power station produce electricity? -- How do we turn light into electricity and then back to light again? -- What have we learned about light and energy?.