D Infrared waves are longer than X-rays
Explanation:
Electromagnetic waves are waves produced by the oscillations of the electric and the magnetic fields. Their vibration occurs in a plane perpendicular to the direction of motion the wave, therefore they are transverse in nature.
All electromagnetic waves travel in a vacuum at the same speed, which is the speed of light:
[tex]c=3.0\cdot 10^8 m/s[/tex]
Electromagnetic waves are also classified into 7 different types, depending on to their wavelength and frequency. Frequency is inversely proportional to the wavelength, so from shortest to longest wavelength (and from highest to lowest frequency), the 7 types are:
Gamma rays
X rays
Ultraviolet
Visible light
Infrared radiation
Microwaves
Radio waves
From this classification, we see that the only correct statement is
D Infrared waves are longer than X-rays.
In fact, infrared waves have wavelength between 700 nm and 10 mm, while X-rays have wavelength between 0.01 and 10 nm.
Learn more about electromagnetic waves:
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