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3. A photon of light has an energy 4.125 x 10-19J. Calculate the wavelength in nanometers.

User Imrichardcole
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1 Answer

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In order to answer this question we will use the Energy formula, but we will find the wavelength through this formula, the formula is:

E = hc/λ

where:

E = energy in joules, 4.125*10^-19

h = Planck's constant, 6.626*10^-34

c = the speed of light, which is also a constant, 2.998*10^8

λ = is the wavelength

We will make the arrangements to find wavelength

λ = hc/E

Now let's add our values to the formula

λ = (6.626*10^-34) * (2.998*10^8)/4.125*10^-19

λ = 4.81*10^-7

1 nanometer is equal to 1*10^-9 meters

Therefore we have 481 nanometers

User Msgambel
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