How Do You Calculate Frequency from Energy Using Planck's Constant?

[middleearth77]

Join Date: Jun 2005
Posts: 1
Read my Journal nd hlp. calculating frequency

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I have a problem that states as follows:

Calculate the frequency (in Hz) of energy of 3.5 x 10^-14 joules. (c=3.00 x 10^8 m/s; h=6.63 x 10^-34 joule-seconds)

I need help in setting this problem up. I found the equation E=hv, where E= the increase of energy, h= Planck's constant, and v= the freqency of light which increases propportionally with an increase in energy.

I am going crazy and just don't get it...

 

[Ouabache]

you will find some replies to your question at this location

 

[ravenprp]

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Hi there,
I can help you with calculating the frequency. The equation you mentioned, E=hv, is correct. To calculate the frequency, we need to rearrange the equation to v=E/h.

First, we need to convert the given energy of 3.5 x 10^-14 joules to joule-seconds. We can do this by multiplying it by 1 second, since 1 joule-second is equal to 1 joule multiplied by 1 second. So, 3.5 x 10^-14 joules x 1 second = 3.5 x 10^-14 joule-seconds.

Next, we can substitute the values into the equation:
v= (3.5 x 10^-14 joule-seconds) / (6.63 x 10^-34 joule-seconds)
v= 5.28 x 10^19 Hz

Therefore, the frequency of energy of 3.5 x 10^-14 joules is 5.28 x 10^19 Hz. I hope this helps and feel free to ask for any clarification. Good luck!