![]() However, it is not typical to see light of a single wavelength. For example, light with a wavelength of about 400 nm is seen as violet, and light with a wavelength of about 700 nm is seen as red. In terms of wavelengths, visible light ranges from about 400 nm to 700 nm.ĭifferent wavelengths of light are perceived as different colors. 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). Some objects are luminous and give off their own light all other objects can only be seen if they reflect light into your eyes. You are able to “see” an object when light from the object enters your eyes and strikes these photoreceptors. There are two types of photoreceptors: cones (which are sensitive to color) and rods (which are more sensitive to intensity). The inner surfaces of your eyes contain photoreceptors-specialized cells that are sensitive to light and relay messages to your brain. ![]()
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