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yeet1-Visitor
1-Visitor
April 26, 2011
Solved

Can not evaluate this accurately

  • April 26, 2011
  • 6 replies
  • 3429 views

Hi,

I am trying to see a laser beam's behaviour but Mathcad doesn't like the characteristic representation of it giving can not evaluate this accurately error.

Please see the attachement, thanks.

Best answer by RichardJ

An update, with what is arguably a better solution to the problem.

6 replies

MikeArmstrong1-Visitor
1-Visitor
April 26, 2011

You have a few issues with your worksheet.

  1. In you beam equation you are try to multiply omega by t, but the dimensions in the array are not the same.
  2. You also have not evaluated e, unless you actually do want to use Mathcad's built in constant.
  3. You have also raised j * omega * f do the power of e, is this correct?

Mike

RichardJ19-Tanzanite
19-Tanzanite
April 26, 2011

Numeric calculation problems again. You are going to keep running into these problems as long as you keep using huge numbers in exponential, sin, cosine, etc. functions.. Express your frequencies in THz to keep the numbers small.

RichardJ19-TanzaniteAnswer
19-Tanzanite
April 26, 2011

An update, with what is arguably a better solution to the problem.

MikeArmstrong1-Visitor
1-Visitor
April 26, 2011

Nicely done Richard.

Mike

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