Learn about light in the photosynthetic process in the Riverdeep SimLibrary activity, 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. Get a free trial subscription . 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. Lasers are possible because of the way light interacts with electrons. Usually they jump right back, releasing the extra energy in the form of light.