Aiken elementary school

think, that you are not..


The inner surfaces of your eyes contain photoreceptors-specialized cells that are sensitive to light and relay messages to your brain. There are two types of photoreceptors: cones which are sensitive to color and rods which are more sensitive to intensity. Some objects are luminous and give off their own light; all other objects can only be seen if they reflect light into your eyes. However, humans can only see visible light, a narrow band of the electromagnetic spectrum which also includes non-visible radio waves, infrared light, ultraviolet light, X-rays, and gamma rays.


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