Calculate the frequency , wave number of the microwaves with wavelength `4 xx 10^(7) `nm

Explanation

To solve the question of calculating the frequency and wave number of microwaves with a wavelength of \(4 \times 10^7\) nm, we will follow these steps:

### Step 1: Convert Wavelength from Nanometers to Meters
The given wavelength is \( \lambda = 4 \times 10^7 \) nm. We need to convert this into meters.

\[ 1 \text{ nm} = 10^{-9} \text{ m} \]
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