are high frequency (short waves) colors mean More visible to human eyes than Low frequency (Long waves) colors?
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Frequency is simply the number of waves per unit of time. There is a certain range of frequencies we can see, and many more we cannot. Red is the lowest visible frequency, violet the highest. We cannot see frequencies lower than red or higher than violet, though we can use them in our technology. For instance, radio waves are the same phenomenon as visible light, just much lower frequency. X-rays are also the same phenomenon, but much higher frequencies than we can see.
Visible light is a very tiny portion of the spectrum.
From highest frequency to lowest, you have
– gamma rays
– x-rays
– ultraviolet (UV)
– visible light
– infrared (IR)
– microwaves
– radio waves
Within the visible portion, purple and blue light have the highest frequency, and red has the lowest
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Our eyes are most sensitive to green light, so the green light is the most visible.
Everything higher or lower in frequency is less visible. Ultraviolet (higher than violet) and infrared (lower than red) are completely invisible.
Frequency of light affects many things. Low frequency waves require a bigger source to create, and a bigger receiver to receive. Materials behave differently in different light: glass is transparent for visible light, but not for ultraviolet. In x-ray, your skin and bones are transparent. And so on.
The frequency of the light determines its color, but more importantly it determines the energy contained in a photon of light–the higher the frequency the greater the energy. This was discovered by Max Planck and used by Albert Einstein in his explanation of the photoelectric effect that won him his Nobel Prize (no he didn’t win it for relativity).
E = hv
E is the energy of the photon
h is Planck’s constant
v is the frequency of the light
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