Question

jin has four colorful glass bottles on his windowsill. one is red, one is violet, one is green, and one is yellow. the light that passes through which bottle has the lowest frequency?
red
violet
green
yellow

Explanation:

In the visible light spectrum, red light has the longest wavelength. According to the relationship \(c = \lambda f\) (where \(c\) is the speed of light, \(\lambda\) is the wavelength, and \(f\) is the frequency), when \(c\) is constant (\(c = 3\times10^{8}\space m/s\) in vacuum), a longer wavelength (\(\lambda\)) corresponds to a lower frequency (\(f\)) since \(f=\frac{c}{\lambda}\). Among red, violet, green, and yellow light, red light has the longest wavelength, so it has the lowest frequency.

Answer:

red