| Why can we see colors? And why can we see light?
|Question Date: 2013-05-18|
This is a good question.
The eye has special cells call photo receptors
that help us see light and color. Specifically,
there are two types of photo receptors called
cones and rods. When scientists discovered cones
and rods, they called named them based on their so
they look like sharp rods and cones. Cones are
concentrated in the fovea and help us see color
and light whereas rods are in the periphery and
help us see light in darker conditions.
Hope you are intrigued to ask more questions
and pursue science and engineering.
We have cells in our eyes that pick up
different frequencies (colors) of light. Light
behaves like a traveling wave and has a frequency,
and the higher the frequency, the bluer (and
brighter) the light.
Different kinds of cells pick up different
frequencies, which is how we can tell one color
The only "light" we can detect with our eyes is
actually the part of the electromagnetic spectrum
called the "visible spectrum." We are unable to
"see" other kinds of light, such as UV, XRay,
Microwave, or Infrared with our eyes. So why can
we see visible light? We have special types of
neuron called photoreceptors in our eyes that
detect photons (the "particles" that comprise
light), and convert that information into
biological signals that our bodies can process.
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