Light is a form of energy that travels in waves and can be seen by the human eye. It is part of the electromagnetic spectrum, which includes other types of energy like radio waves, microwaves, and X-rays. Light is essential for life on Earth, as it enables photosynthesis in plants, allowing them to convert sunlight into food. Energy, in general, is the ability to do work or cause change. It exists in various forms, including kinetic energy, potential energy, and thermal energy. Energy can be transformed from one form to another, such as when solar panels convert sunlight into electrical energy for use in homes and businesses.