To which regions of the electromagnetic spectrum do the following wavelengths belong :
250 nm 

Explanation

To determine the region of the electromagnetic spectrum that corresponds to a wavelength of 250 nm, we can follow these steps:

### Step-by-Step Solution:

1. **Convert the Wavelength to Meters**:
- The given wavelength is 250 nm (nanometers).
- We know that 1 nm = \(10^{-9}\) meters.
- Therefore, \(250 \, \text{nm} = 250 \times 10^{-9} \, \text{m} = 2.5 \times 10^{-7} \, \text{m}\).
...