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Lecture 7 - What do we see LIGHT WAVES they are composed of...

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What do we see? LIGHT WAVES: they are composed of pulses of electromagnetic energy that vary in both wavelength and amplitude The wavelength (ie. Frequency) of the light pulse is what determines the hue (color) of the light wave The amplitude of the wave is what determines the intensity of the light The eye contains a vast number of receptors that convert stimuli into neural messages through a process called transduction. Stimuli: energies that affect what we do - structure of the eye: the pupil: a small adjustable opening in the eye through which light enters. It’s the black dot in their eye. - Iris- the colored adjustable muscle on the surface of the eye that is responsible for controlling the amount of light that enters the eye through the pupil. It controls the amount of light that enters the eye. Iris also is affected through intake of certain drugs; it can become very small from alcohol. The iris automatically contracts (dilate) when you are paying attention to something.
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