How Is Light Reflected Back to the Eye?
- Light is present in a spectrum of wavelengths, both visible and invisible. Every object has properties that determine which wavelengths of visible light are absorbed and which ones are reflected. When light hits an objects, the wavelengths that aren't absorbed are bounced back towards the eye. These wavelengths determine the colors you perceive the object to be.
- The lens of the eye focuses the light as it travels through the eye on its way to the retina. The pupil acts like a camera's aperture, closing and opening to either let in less or more light depending on the situation.
- The retina is the lining of the back of the eye. It contains cells called rods and cones that absorb the light reflected off of objects. The rods and cones convert this light into an electrical signal that is sent to the brain via the optic nerve. If the eye's lens does not focus the light on the right part of the retina, vision will be affected.
Light and Objects
Lens and Pupil
Retina
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