Multiple Choice
Which of the following colors of visible light has less energy than green light?
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9. Quantum Mechanics
Electromagnetic Spectrum
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which form of radiation in the electromagnetic spectrum has the longest wavelength?
A
Radio waves
B
X-rays
C
Ultraviolet
D
Visible light
Verified step by step guidance1
Recall that the electromagnetic spectrum is arranged by wavelength, from longest to shortest wavelength: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Understand that wavelength (\( \lambda \)) and frequency (\( \nu \)) are inversely related by the equation:
\(\lambda = \frac{c}{\nu}\)
where \( c \) is the speed of light.
Since radio waves have the lowest frequency among the options given, they correspond to the longest wavelength.
X-rays, ultraviolet, and visible light have progressively shorter wavelengths compared to radio waves.
Therefore, among the choices, radio waves have the longest wavelength in the electromagnetic spectrum.
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