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Which of these colours in the visible spectrum has the longest wavelength?

Physics
JAMB 2025

Which of these colours in the visible spectrum has the longest wavelength?

  • A. Red
  • B. Blue
  • C. Yellow
  • D. Violet
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Correct Answer: Option A
Explanation

Answer: A. Red (Visible spectrum: red ~700 nm, longest; violet ~400 nm, shortest.)

There is an explanation video available below.

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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076
WAEC offline past questions - with all answers and explanations in one app - Download for free
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