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Radiowaves of wavelength 3m are incident...

Radiowaves of wavelength `3m` are incident on a rectangular hole of width `5m`. A screen is placed at a distance `200m` from the hole. The width of the central is `100bm`. Then find `b`.

Text Solution

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The correct Answer is:
3

`sintheta=(lamda)/a=3/5`
`theta=37^(@)`
`tantheta=w/(2D)`
`3/4=2/(400)`
`w=300m`
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