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^@`.

`2.5 cm`

`2 cm`

`25 cm`

`2 mm`

Text Solution

Verified by Experts

The correct Answer is:

As, `a sin theta = nlambda`
`lambda = (a sin theta)/(n) = (5sin 30^(@))/(1) = 2.5 cm`

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