Light is a transmission of energy carried on an electromagnetic wave which moves from a light source, near or far, and advances through space in straight lines.
The sun is our main source of light, sending its light through the cosmos including towards the face of the earth.
This radiation originates in the sun’s outer layer where the temperature can reach 5,500 degrees Celsius (9,932 degrees Fahrenheit).
The speed of this electromagnetic radiation, which reaches about 300,000 km per second (186,000 miles per second), is the fastest known speed in the universe.
An optical illusion is a type of illusion which involves fooling your visual perception of a picture or a shape. The eye gathers visual information which it decodes within the brain, and there are ways to trick the brain and cause it to perceive something which doesn’t actually exist.