Visible Spectrum Frequency Order Steps:

• Recall that frequency increases as wavelength decreases in the electromagnetic spectrum.
• Standard visible color order from lowest to highest frequency: red, orange, yellow, green, blue, violet.
• Compare options to this sequence, noting ROYGBV mnemonic.
• Identify the option matching increasing frequency exactly.

Why B is correct:

• It lists colors from red (lowest frequency) to violet (highest), aligning with the electromagnetic spectrum where frequency f = c/λ, increasing as wavelength λ shortens from red to violet.

Why the others are wrong:

• A: Begins with high-frequency colors (blue, violet) before low-frequency red, reversing the order.
• C: Inserts violet too early after orange, disrupting the progressive increase.
• D: Places violet before blue, but violet has higher frequency than blue.

Final answer: B