lecture26-interference-

lecture26-interference- - What you will be able to do a/er...

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What you will be able to do a/er today … the condi4ons for construc4ve and destruc4ve interference Explain … the phase shi/ for two interfering waves the path diFerence for two interfering Calculate … knowledge about phase shi/ from traveling waves Apply …
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Interference So far we have looked at standing waves equal frequency traveling in opposite direc4ons What is the phase diFerence of two points on the SAME wave? QUESTION: A 440 Hz sound wave in air has a speed of v = 345 m/s. 1) What ` s the wavelength? A) 78 cm B) 39 cm C) 23 cm D) 12 cm E) other
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Interference So far we have looked at standing waves equal frequency traveling in opposite direc4ons What is the phase diFerence of two points on the SAME wave? à worksheet QUESTION: A 440 Hz sound wave in air has a speed of v = 345 m/s. 2) At a particular instant, what is the phase difference (in rad) between two points 4.4 cm apart? A) 0.18 rad 2) 0.35 rad C) 0.54 rad D) 0.71 rad E) other
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Interference So far we have looked at standing waves equal frequency traveling in opposite direc4ons What is the phase diFerence of two points on the SAME wave? à worksheet QUESTION: A 440 Hz sound wave in air has a speed of v = 345 m/s. 3) How much time is required for a phase change of Δφ = π /2 (90 0 ) for a given point in space? A) 0.23 ms C) 1.34 ms C) 0.07 ms D) 0.57 ms E) other
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Interference So far we have looked at standing waves equal frequency traveling in opposite direc4ons What happens when waves travel in the same direc4on?
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lecture26-interference- - What you will be able to do a/er...

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