Multiple choice

The electromagnetic radiations are in descending order of wavelength in the following sequence:

  1. infrared waves, radio waves, x-rays, visible light

  2. radio waves, infrared waves, visible light, x-rays

  3. radio waves, visible light, infraredwaves, x-ray

  4. x-ray, visible light, infrared waves, radio waves
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The electromagnetic spectrum in order of INCREASING wavelength (decreasing frequency and energy) is: X-rays → visible light → infrared → radio waves. Therefore, in DESCENDING order of wavelength: radio waves (longest) → infrared waves → visible light → X-rays (shortest). Option B correctly lists them from longest to shortest wavelength.

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