Question

The human eye is most sensitive over the same wavelength range at which the Sun emits...

The human eye is most sensitive over the same wavelength range at which the Sun emits its greatest intensity of radiation. Suppose creatures were to evolve on a planet orbiting a star somewhat colder than the Sun. To what wavelengths would their vision most likely be sensitive? Explain your reasoning.

Homework Answers

Answer #1

It is important to understand the frequency spectrum as well as the color temperature that goes with those colors. For instance; a sun which peaks in the blue is much hotter than a sun that peaks in the red.

Our sun's spectrum peaks in the green; a sun that is colder than ours would have its spectrum shifted down in color temperature, towards the Red, so Infrared is a good bet. Having wavelength range of 1 cm to 10^-4 cm.

As for white; remember that white is a presence of all colors visible to the human eye so I think in the parlance of the question it is safe to assume that the range they are asking for is not going to be the the same visible spectrum we know.

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