Multiple Choice
What is the energy, in joules, of a single photon with a wavelength of 400.0 nm?
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9. Quantum Mechanics
The Energy of Light
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is a quantum of light called?
A
Proton
B
Neutron
C
Photon
D
Electron
Verified step by step guidance1
Understand that light exhibits both wave-like and particle-like properties, a concept known as wave-particle duality.
Recognize that the particle aspect of light is quantized, meaning it comes in discrete packets of energy.
Identify that each discrete packet or quantum of light energy is called a 'photon'.
Recall that photons have no mass and carry energy proportional to the frequency of the light, given by the equation \(E = h \nu\), where \(E\) is energy, \(h\) is Planck's constant, and \(\nu\) is the frequency.
Note that protons and neutrons are particles found in atomic nuclei, and electrons are negatively charged particles orbiting the nucleus, so they are not quanta of light.
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