convert db to watt/cm^2

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convert db to watt/cm^2

Postby y » Tue Dec 14, 2004 1:54 am

how do i convert db to watt/cm^2?
y
 

Re: convert db to watt/cm^2

Postby Knight » Tue Dec 14, 2004 9:09 pm

y wrote:how do i convert db to watt/cm^2?
Remember first that db is a measurement of the differential in power, where watt/cm² is a measurement of power.

That said, you can use:

-db = 10Log(So/Sr)
where Sr = 10^-16 watts/cm²

So, given an observed power of 10^-6 watt/cm² you'd have:

db = 10Log(10^-6/10^-16)=100 db
William J. Knight
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Los Alamos National Labs
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