If we interpret this question as "which
colored light looks the brightest", then we
can say that because of the sensitivity of our
eyes, green will appear the brightest. This
can be seen with different colored laser
pointers, which generate beams of light at
single wavelengths (visible light, light that is
visible to our eyes, have different wavelengths
that are measured in hundreds of nanometers). Our
will perceive the green laser as the brightest
Because of the same eye perception, when we
look at different colors (such as paint colors,
clothes colors, etc) under the same intensity of
white light, we also perceive a yellowish-green
color as the brightest.
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