Which of the following, the correct arrangement of electromagnetic spectrum in decreasing order of wavelength is ______.
Fill in the blank with the correct answer from the options given below
Which of the following, the correct arrangement of electromagnetic spectrum in decreasing order of wavelength is ______.
Fill in the blank with the correct answer from the options given below
- Radio waves, X-rays, Infrared waves, microwaves, visible waves
- Infrared waves, microwaves, Radio waves, X-rays, visible waves
- Radio waves, microwaves, Infrared waves, visible waves, X-rays
- X-rays, visible waves, Infrared waves, microwaves, Radio waves
The Correct Option is C
Approach Solution - 1
The electromagnetic spectrum is a range of all types of electromagnetic radiation, which vary in wavelength and frequency. To arrange different types of waves in decreasing order of wavelength, we follow this sequence:
- Radio waves: Typically have the longest wavelengths in the electromagnetic spectrum, ranging from about 1 millimeter to 100 kilometers or more.
- Microwaves: Have shorter wavelengths than radio waves, generally from 1 millimeter to 1 meter.
- Infrared waves: These range from about 700 nanometers to 1 millimeter.
- Visible waves: The part of the electromagnetic spectrum that human eyes can see, with wavelengths from approximately 380 nanometers to 750 nanometers.
- X-rays: Have much shorter wavelengths, ranging from 0.01 to 10 nanometers.
Arranging the options in the decreasing order of wavelength, the correct sequence is: Radio waves, microwaves, Infrared waves, visible waves, X-rays
Approach Solution -2
The electromagnetic spectrum, in order of decreasing wavelength (and increasing frequency), is:
Radio waves > Microwaves > Infrared waves > Visible light > Ultraviolet light > X-rays > Gamma rays
Let's analyze the given options:
Option 1: Radio waves, X-rays, Infrared waves, microwaves, visible waves
Incorrect. X-rays have a much shorter wavelength than radio waves.
Option 2: Infrared waves, microwaves, Radio waves, X-rays, visible waves
Incorrect. X-rays have a much shorter wavelength than any of the other waves listed.
Option 3: Radio waves, microwaves, Infrared waves, visible waves, X-rays
Correct. This follows the correct order of decreasing wavelength.
Option 4: X-rays, visible waves, Infrared waves, microwaves, Radio waves
Incorrect. X-rays have the shortest wavelength, and radio waves have the longest.
Therefore, the correct arrangement is:
Option 3: Radio waves, microwaves, Infrared waves, visible waves, X-rays
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