Electromagnetic Radiation-Really easy but I am stuck

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SUMMARY

The discussion centers on calculating the number of wavelengths of electromagnetic radiation emitted by a 60 Hz electrical transmission line needed to span approximately 5,000 kilometers across North America. The relevant formula used is v = fλ, where v is the speed of light (c = 3.0 x 10^8 m/s), f is the frequency (60 Hz), and λ is the wavelength. The correct wavelength calculation yields λ = c/f = 5.0 x 10^6 m, leading to the conclusion that the number of wavelengths required is 1.0, which was initially misinterpreted by the user.

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samdiah
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Homework Statement



How many wavelengths of radiation emitted by a 60 Hz electrical transmission line would it take to span the North American continent (a distance approximation 5.0*10^3 km).

f=60Hz
d=5.0*0^3 km=5.0*10^6 m

Homework Equations



v=fλ
Δd=vΔt

The Attempt at a Solution



Δt=d/v
= 1.67*10^-2

If speed is c then wavelength should equal c/f=3.0*10^8/60
=5.0*10^6

Which is absoloutely wrong since answer is 1.0.

Please help me and thanks in advance.
 
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samdiah said:
Δt=d/v
= 1.67*10^-2
Not sure what you are calculating here.

If speed is c then wavelength should equal c/f=3.0*10^8/60
=5.0*10^6
That's all you need. Hint: Units!

Which is absoloutely wrong since answer is 1.0.
Not as wrong as you think! :wink:
 
Thank You very much!
 

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