Week 04 관련

• Energy Density
  • Standing Wave
• Plank

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Energy Density

Standing Wave

• nothing in between the dots count.
• only the dots in the axis are
  • http://hyperphysics.phy-astr.gsu.edu/hbase/waves/string.html
  • http://www.pleacher.com/mp/mlessons/calculus/relderiv.html

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Plank

what if energy value that is allowed in this cavity, is the value that is not continous?