Which of the following radiations has the highest wave number ? X-Rays, Microwaves, I. R. Rays, Radiowaves

Explanation

To determine which of the given radiations has the highest wave number, we need to understand the relationship between wavelength, frequency, and wave number.

### Step-by-Step Solution:

1. **Understanding Wave Number**:
- Wave number (denoted as \( \tilde{\nu} \)) is defined as the number of waves per unit distance and is inversely related to wavelength. It is given by the formula:
\[
\tilde{\nu} = \frac{1}{\lambda}
...