Arrange X-rays, cosmic rays and radiowaves according to frequency.

Explanation

To arrange X-rays, cosmic rays, and radio waves according to their frequency, we need to understand the relationship between frequency and wavelength. The frequency (ν) of electromagnetic waves is inversely proportional to their wavelength (λ), which can be expressed by the formula:

\[ \nu = \frac{c}{\lambda} \]

where \( c \) is the speed of light in a vacuum (approximately \( 3 \times 10^8 \) m/s).

### Step-by-Step Solution:

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