What is the wavelength of orange light?

The wavelength of orange light typically falls within the range of approximately 590 to 620 nanometers (nm). The closest choice provided that aligns with this range is 630 nm, which represents the shorter end of orange/red light. This wavelength corresponds to the color orange when compared against the visible spectrum of light, which generally lists colors by their wavelengths.

While the choices presented include values that might belong to other colors in the visible spectrum, 630 nm is indeed the best representation for orange light among the options. Wavelength values that are significantly lower, like 450 nm, generally correspond to blue/violet light, while higher values such as 680 nm or 690 nm are indicative of red light. Thus, 630 nm accurately aligns with the characteristics of orange light.