Final answer:
Colors in the visible light spectrum are ranked by frequency as red (lowest frequency), yellow, green, and violet (highest frequency).
Step-by-step explanation:
The colors green, red, violet, and yellow according to their increasing frequency in the visible light spectrum can be arranged based on their frequency. The order of colors by frequency, from lowest to highest, is red, yellow, green, and violet. This ranking is based on the fact that red light has the lowest frequencies and longest wavelengths, while violet light has the highest frequencies and shortest wavelengths.
We recall the sequence of colors in the visible light spectrum by the mnemonic ROY G BIV which stands for Red, Orange, Yellow, Green, Blue, Indigo, and Violet. This sequence also indicates the order of wavelengths from longest to shortest, and inversely, the order of frequencies from lowest to highest.