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The decreasing order of wavelength of infrared, microwave, ultraviolet and gamma rays is

1. microwave, infrared, ultraviolet, gamma rays
2. gamma rays, ultraviolet, infrared, microwaves
3. microwaves, gamma rays, infrared, ultraviolet
4. infrared, microwave, ultraviolet, gamma rays

Correct answer: microwave, infrared, ultraviolet, gamma rays

Solution

The electromagnetic spectrum arranges waves in order of decreasing wavelength as microwaves > infrared > ultraviolet > gamma rays. Microwaves have the longest wavelength, while gamma rays have the shortest.

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