Which one of the following wavelength radiations may correspond to an X-ray ?

The electromagnetic spectrum categorizes waves by their wavelength and frequency. Visible light ranges from approximately 400 nm to 700 nm [1]. Ultraviolet radiation extends from the edge of visible light (400 nm) down to about 10 nm. X-rays occupy the region with even shorter wavelengths, typically ranging from 10 nm down to 0.01 nm. Specifically, 'soft' X-rays are found near the 10 nm to 1 nm range, while 'hard' X-rays, used in medical imaging, have wavelengths between 0.1 nm and 0.01 nm. Among the given options, 1 nm falls squarely within the X-ray spectrum. Options 2 (10 nm) is the boundary with ultraviolet, while 100 nm and 300 nm are classified as ultraviolet radiation [1]. Therefore, 1 nm is the most accurate representation of an X-ray wavelength.

Sources

1. [1] https://imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html