Physics 9702 · AS & A Level · Progressive waves

Progressive waves — practice question

A wave with amplitude $A$ has intensity $I$. When it travels through a particular medium, its intensity becomes $\dfrac{I}{4}$. What is the wave’s new amplitude?

  • A$2A$
  • B$\dfrac{A}{2}$
  • C$\dfrac{A}{4}$
  • D$\dfrac{A}{16}$

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