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How do I find the color of the threshold wavelength if the metal has a threshold wavelength of $\mathrm{6.5\times 10^{-7}m}$? I know that converts down to $\mathrm{650\ nm}$, but can I still use the visible color spectrum's wavelengths to find the color or is it different for metal?

I'm sorry I'm new to this and am just making sure it still applies.

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Hi Mia. If you're interested in finding colors, then there are many online calculators like this one ;-) –  Waffle's Crazy Peanut Apr 28 '13 at 2:30
Thank you so much!!! –  Genevieve Ccio Apr 28 '13 at 5:44

1 Answer 1

up vote 1 down vote accepted

The metal's threshold wavelength is a wavelength of light. So yes, you would use a chart converting wavelengths of light to the color to identify it. For some metals, the threshold wavelength is not visible light; it might be ultraviolet. But whatever chart you're using would identify the wavelength you have as either ultraviolet or visible, and which color it is.

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