Plants turn light into chemical energy in the form of sugars, which fuel the entire food web. The Role of Light in Photosynthesis . Then see if you can draw a connection between the photosynthetic process and people's craving for light and carbohydrates during the winter. The spread of electricity has made it easier to light up the long winter nights. On December 31, laser light shows were part of major New Year's Eve celebrations from the Niagara Falls Winter Festival of Lights to First Night Santa Fe.
Light travels in waves.
It is part of the electromagnetic spectrum that includes radio waves, microwaves, X rays, and gamma rays. These waves are invisible to the human eye. Light is the part of the spectrum that stimulates the eye's retina, resulting in sight. Usually they jump right back, releasing the extra energy in the form of light. The energy levels or states can be imagined as rings or orbits around a nucleus.