Plane microwaves are incident on a long ...

Plane microwaves are incident on a long slit having a width of 5.0 cm. Calculate the wavelength of the microwaves if the first diffraction minimum is formed at `theta=30^@`.

5 cm

5 mm

25 cm

`2.5cm`

Text Solution

Verified by Experts

The correct Answer is:

For first minima (n=1) a `sintheta=lamda`
`:.lamda=5xxsin30=2.5cm`

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