Установите последовательность пропущенных в тексте слов.
The form of energy that illuminates our world is called 1_______. It usually comes from hot objects, like the sun or fire, but it is also produced by electricity and some 2_______ reactions. Light is the only part of the electromagnetic spectrum that is visible to the human eye. It travels at 186,000 miles (300,000 km) per second, and nothing can 3_______ faster. Like other forms of energy, light travels in 4_______, but it can also travel in packets of energy called quanta.
light
chemical
travel
waves