A 2.00 m wave has a frequency of 686 Hz. What is the speed of the wave?
1 answer:
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1. Frequency:
The energy given is the energy per mole of particles:
1 mole contains a number of Avogadro of particles, , equal to
particles
So, by setting the following proportion, we can calculate the energy of a single photon:
This is the energy of a single photon; now we can calculate its frequency by using the formula:
where
is the Planck's constant
f is the photon frequency
Solving for f, we find
2. Wavelength:
The wavelength of the photon is given by the equation:
where
is the speed of the photon (the speed of light). Substituting,