Question:

Arrange the following in decreasing order of wavelength.

Updated On: Apr 15, 2024
  • Infrared > UV rays > X-rays
  • Infrared > X-rays > UV rays
  • UV rays > X-rays > Infrared
  • X-rays > Infrared > UV rays
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The Correct Option is A

Solution and Explanation

Infrared > UV rays > X-rays
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Concepts Used:

Electromagnetic Spectrum

The term used by scientists to describe the entire range of light that exists is the electrostatic spectrum. Light is a wave of alternating electric and magnetic fields. The propagation of light doesn't vary from waves crossing an ocean. Like any other wave, light also has a few fundamental properties that describe it. One is its frequency. The frequency is measured in Hz, which counts the number of waves that pass by a point in one second. 

The electromagnetic waves that your eyes detect are visible light and oscillate between 400 and 790 terahertz (THz). That’s several hundred trillion times a second.