Terahertz vs X-ray | Difference between Terahertz and X-ray
This page compares Terahertz vs X-ray and mentions difference between Terahertz and X-ray.
Introduction: Both Terahertz (THz) and X-ray fall under EM spectrum. Both are used for unique applications. Though they have some similarities, there are differences too as outlined below.

Let us derive comparison between these three frequencies based on various parameters such as frequency, wavelength, radiation, photon energy, advantages, disadvantages and their respective applications.
Difference between Terahertz and X-ray
Following table mentions difference between Terahertz and X-ray.
Features | Terahertz | X-ray |
---|---|---|
• Frequency range | Lower than X-ray, 0.1 to 10 THz (1 THz equals 1 x 1012 Hz) | Higher than Terahertz, 30 Petahertz to 30 Exahertz (i.e. 3 x 1016 to 3 x 1019) |
• Radiation type | Non-ionizing | Ionizing |
• Photon energy | Low | High |
• Wavelength | Lower | Higher |
• Advantages | • Easily pass through non-conducting material• Higher bandwidth• Minimum effects on human body | • Not absorbed very much by air• Diagnose tumours without the need of surgery• used by radiologists to identify cracks• to identify abnormal bones etc. |
• Disadvantages | • It can not penetrate liquid water or metal • does not support long range communication due to atmospheric loss | • Causes ionization and hence it often leads to cancer• Bones block significant diagnostic data as it absorbs radiation |
• Detection of organic materials and their classes | Possible using THz imaging | Not possible using X-ray imaging |
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