# How do you calculate the energy of a photon of electromagnetic radiation?

You use either the formula

EXAMPLE 1

Calculate the energy of a photon of radiation whose frequency is

Solution 1

The energy is

EXAMPLE 2

Calculate the energy of a photon of radiation that has a wavelength of 3.3 µm.

Solution 2

Here's a video on how to find the energy of a photon with a given wavelength.

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The formula for calculating the energy of an electromagnetic radiation photon is E = h * f, where h is Planck's constant (6.62607015 × 10^-34 m^2 kg / s), f is the radiation frequency in hertz (Hz), and E is the photon's energy. Alternatively, you can use the formula E = hc / λ, where λ is the radiation's wavelength in meters and c is the speed of light (roughly 3.00 × 10^8 m/s).

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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