Visible Light Spectrum Properties

Steps:

• Visible spectrum orders colors from violet (shortest wavelength) to red (longest wavelength).
• Wavelength λ and frequency f relate by f = c / λ, where c is constant speed of light.
• Red light has longer λ than violet, so lower f.
• Compare options to this relationship.

Why B is correct:

• Red light has lower frequency than violet, as frequency inversely proportional to wavelength in electromagnetic spectrum (f = c / λ).

Why the others are wrong:

• A: Prism deviates violet light more than red due to dispersion.
• C: Red light has longer wavelength than violet.
• D: Speed of all light in vacuum is identical (c = 3 × 10^8 m/s).

Final answer: B