Multiple Choice
A standard cell phone transmits electromagnetic waves with a frequency of . Calculate the wavelength of these electromagnetic waves (in cm).
32. Electromagnetic Waves
The Electromagnetic Spectrum
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Which of the following types of electromagnetic waves has the longest wavelength?
A
FM radio
B
Microwave
C
Infrared
D
Ultraviolet
E
Gamma rays
F
AM radio
Verified step by step guidance1
Understand the electromagnetic spectrum: Electromagnetic waves are categorized by their wavelengths and frequencies. The spectrum ranges from radio waves, which have the longest wavelengths, to gamma rays, which have the shortest.
Identify the order of wavelengths: In the electromagnetic spectrum, the order from longest to shortest wavelength is typically radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Differentiate between AM and FM radio waves: AM (Amplitude Modulation) radio waves have longer wavelengths compared to FM (Frequency Modulation) radio waves. This is because AM radio operates at lower frequencies than FM radio.
Compare the given options: Among the options provided (FM radio, Microwave, Infrared, Ultraviolet, Gamma rays), FM radio waves have longer wavelengths than microwaves, infrared, ultraviolet, and gamma rays.
Conclude with the correct answer: Based on the understanding of the electromagnetic spectrum and the comparison of wavelengths, AM radio waves have the longest wavelength among the options provided.
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