Final answer:
For visible light in terms of wavelength, red light has the longest wavelength and blue has the shortest; however, in terms of frequency, blue has the lowest frequency and red has the highest. The mnemonic ROY G BIV helps remember the order, and for RGB colour displays, the approximate wavelength ranges for red are 620-750 nm, green 495-570 nm, and blue 450-495 nm.
Step-by-step explanation:
The question asks about the wavelengths and frequencies of colours, specifically addressing yellow, blue, and red light within the visible spectrum. Colours of light are ordered differently depending on whether we're looking at them in terms of wavelength or frequency due to their inverse relationship. The mnemonic ROY G BIV can help us remember the order of colours by wavelength, as it stands for Red, Orange, Yellow, Green, Blue, Indigo, and Violet, which means the order from the longest to shortest wavelength is Red, Yellow, Blue. Therefore, the correct answer is wavelength: red, yellow, blue. Since frequency and wavelength are inversely related, the order of colours by frequency is the reverse of that by wavelength. Therefore, the colours ordered from lowest to highest frequency would be frequency: blue, yellow, and red. For colours in RGB colour television and computer displays, red light typically has a longer wavelength (~620 to 750 nm), green is in the middle (~495 to 570 nm), and blue is shorter (~450 to 495 nm). The frequency and energy of a photon can be calculated using the formula E = hν, where E is energy, h is Planck's constant, and ν is frequency. The frequency can be derived from the speed of light divided by the wavelength. Due to space constraints, specific numeric answers for each colour are not provided here.