Sunlight

A photovoltaic cell, PV cell, solar cell, or solar cell is a component that produces electricity when exposed to light. The photovoltaic cell is made of semiconductor materials that absorb the rays emitted by the sun and generate an electric current. A solar panel is formed by bringing together more...

Sunlight and moonlight are very similar. Sunlight comes to earth directly from the sun. Moonlight, on the other hand, is a reflection of sunlight. Sunlight first hits the moon, the light reflected from the moon reaches the earth. Sunlight is a key factor for the nutrition and growth of plants....

A light bulb we use at home everyday emits about one quintillion photons per second and hundreds of billions of photons included in the light are coming into our eyes. The light energy delivered to the eye plays a key role in maintaining normal biological activities including visual perception, circadian...