Receptors in particular photoreceptors...question

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Death Adder
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Receptors in particular photoreceptors...question

Post by student12 » Sun May 14, 2006 12:35 pm

Quote from book : "Photoreceptors respond to a relatively limited range of wavelenths, from infrared (heat) through visible light to ultraviolet. Interestingly, both animals and plants respond to light in this range."

Question: How can we photoreceptors respond to infrared (heat waves) and ultraviolet light if we can not see it?

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Inland Taipan
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Post by mith » Sun May 14, 2006 5:38 pm

seeing is part of the interpretation caused by the brain, I think UV rays can still damage your eyes even if you don't "see" it.
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