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Which type of electromagnetic waves has the longest wavelengths and lowest frequencies?
A
Radio waves
B
Ultraviolet waves
C
X-rays
D
Gamma rays
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1
Recall the electromagnetic spectrum, which organizes electromagnetic waves by their wavelength and frequency.
Understand that wavelength and frequency are inversely related by the equation \(\lambda = \frac{c}{f}\), where \(\lambda\) is wavelength, \(c\) is the speed of light, and \(f\) is frequency.
Identify that waves with the longest wavelengths have the lowest frequencies, and waves with the shortest wavelengths have the highest frequencies.
Review the order of electromagnetic waves from longest wavelength/lowest frequency to shortest wavelength/highest frequency: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Conclude that radio waves have the longest wavelengths and lowest frequencies among the options given.