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A Electromagnetic force density

  1. Mar 6, 2017 #1
    upload_2017-3-6_11-51-8.png


    Hi everyone, initially I would like to put into words that this equation in my attachment is provided by Julius Adams Stratton but he do not derive the equation. The only part I do not understand and can not derive is the "RED" part. He just says it results from light pressure. So, I would like to ask : How can we reach this formula painted with RED???? How do we derive this part ????????
     

    Attached Files:

  2. jcsd
  3. Mar 6, 2017 #2

    DrClaude

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    Staff: Mentor

    What is reference 19?
     
  4. Mar 6, 2017 #3
    upload_2017-3-6_12-11-16.png
     
  5. Mar 6, 2017 #4
    Additionally, I have the book but nothing is derived.....So, Any idea related to how to derive the "RED" part?????
     
  6. Mar 6, 2017 #5
    @DrClaude Could you express something about my question after I shared the reference????????
     
  7. Mar 6, 2017 #6

    DrClaude

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    Staff: Mentor

    I dinät have access to that book right now, so I can't help for the moment. Maybe someone else will chime in in the mean time.
     
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