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
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
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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