The Energy of Light Video Lessons

Concept: The Energy of Light

# Problem: An AM radio station broadcasts at 1030 kHz , and its FM partner broadcasts at 98.4 MHz .Calculate the energy of the photons emitted by the AM radio station.

###### FREE Expert Solution

We’re being asked to calculate the energy of the photons emitted by the AM radio station.

Recall that the energy of a photon (E) is given by:

$\overline{){\mathbf{E}}{\mathbf{=}}{\mathbf{hv}}}$

where:

h = Planck’s constant (6.626 × 10–34 J • s)

v = frequency (in s–1)

First, let’s convert the frequency in kHz to s-1 to be able to cancel out units.

• The conversion factors are:

1 kHz = 10-3 Hz

1 Hz = 1 s-1

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###### Problem Details

An AM radio station broadcasts at 1030 kHz , and its FM partner broadcasts at 98.4 MHz .

Calculate the energy of the photons emitted by the AM radio station.