Visible Spectrum Wavelength Order

Steps:

• List visible spectrum colors by increasing wavelength: violet, indigo, blue, green, yellow, orange, red.
• Identify colors immediately after indigo: blue (next), green (following), yellow (after green).
• Match sequence to options: blue → green → yellow fits directly.
• Confirm no skips or reversals in the progression.

Why B is correct:

• B follows the electromagnetic spectrum definition, where wavelength increases sequentially from indigo (~450 nm) through blue (~475 nm), green (~510 nm), to yellow (~570 nm).

Why the others are wrong:

• A: Places orange after green, but orange follows yellow, skipping the correct order.
• C: Reverses blue and green, violating increasing wavelength progression.
• D: Starts with yellow, omitting blue and green that directly follow indigo.

Final answer: B