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NEETPhysicsElectromagnetic Waves

Which of the following represents the correct decreasing order of wavelengths for the given electromagnetic waves?

Options

  1. AMicrowaves > Red light > Blue light > X-rays
  2. BX-rays > Blue light > Red light > Microwaves
  3. CMicrowaves > Blue light > Red light > X-rays
  4. DRed light > Microwaves > X-rays > Blue light

Correct answer

A. Microwaves > Red light > Blue light > X-rays

Step-by-step solution

The complete electromagnetic spectrum in decreasing order of wavelength is: Radio waves > Microwaves > Infrared > Visible light > Ultraviolet > X-rays > Gamma rays. Within the visible spectrum, wavelength decreases from red to violet (VIBGYOR). Therefore, red light has a longer wavelength than blue light. Combining both sequences, the correct decreasing order of wavelengths is: Microwaves > Red light > Blue light > X-rays. Answer: Microwaves > Red light > Blue light > X-rays

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