Multiple Choice
What is the wavelength in nanometers of light with a frequency of 7.8 × 10^{15} Hz? (Speed of light c = 3.00 × 10^{8} m/s)
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9. Quantum Mechanics
Wavelength and Frequency
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the electromagnetic spectrum, which property of radiation is directly determined by its wavelength?
A
Energy
B
Frequency
C
Amplitude
D
Color
Verified step by step guidance1
Understand that the electromagnetic spectrum consists of waves characterized by properties such as wavelength, frequency, energy, amplitude, and color.
Recall the relationship between wavelength (\( \lambda \)) and frequency (\( \nu \)) given by the equation:
\[ \nu = \frac{c}{\lambda} \]
where \( c \) is the speed of light.
Recognize that energy (\( E \)) of electromagnetic radiation is related to frequency by Planck's equation:
\[ E = h \nu \]
where \( h \) is Planck's constant.
Note that amplitude relates to the intensity or brightness of the wave, not its wavelength or frequency.
Understand that color is a perceptual property directly linked to the wavelength of visible light, meaning wavelength directly determines the color we perceive.
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