What is an example of a Planck's constant practice problem?

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What is an example of a Planck's constant practice problem?

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Answer 1 · 2015-05-23T20:07:44

Planck's constant, "h", can be used to find the energy of a photon of electromagnetic radiation. The equation is $E = h ν$ $E=hnu$ , where $E$ $E$ is energy in Joules (J), $h$ $h$ is Planck's constant, $6.626 \times 10 (- 34) J \cdot s$ $6.626xx10(-34) J*s$ , and $ν$ $nu$ is the frequency. The unit for frequency is Hertz (Hz), and $1 Hz= \frac{1}{s}$ $"1 Hz="1/s"$ .

Practice Problem

The energy of a photon of red light is $2.84 \times 10^{- 19} J$ $2.84xx10^(-19) "J"$ . What is it's frequency?

Solve the equation $E = h ν$ $E=hnu$ for $ν$ $nu$ .

$ν = \frac{E}{h}$ $nu=E/h$ =

$(2.84xx10^(-19) cancel"J")/(6.626xx10(-34) cancel"J*s")=(4.29xx10^(14))/("s")=4.29xx10^(14)"Hz"$

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What is an example of a Planck's constant practice problem?

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