Interference In Waves

Interference in waves Water waves.

[object Object],[object Object]

Draw concentric lines emanating from two point sources. Use alternate solid and dashed lines to represent peaks and troughs

Mark points of destructive interference.

Connect these marks with straight lines using a ruler

Young’ double slits. ,[object Object],[object Object],[object Object]

We can predict the separation of the maxima produced on the screen using the formula:  = ws D Where: w is the width between the centres of the slits. s is the separation of the fringes. D is the distance between the slits and the screen  is the wavelength of the light source.

[object Object],intensity distance The higher the intensity the brighter the fringes. Centre fringe is usually double the width of the others

[object Object],[object Object],[object Object], = 6E-7 D = 20cm w = 1mm Calculate the separation of the fringes (s) screen

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Interference of sound ,[object Object],Sig gen D s w speakers detector As we move the detector (microphone and CRO/ear) we can detect the maxima and minima for any constant tone being played.

[object Object],[object Object],[object Object]

Interference In Waves

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Interference In Waves