How Do You Convert Terahertz to Hertz?
Multiply terahertz by 1,000,000,000,000 (10^12) to get hertz. The formula is: Hz = THz x 10^12. The prefix "tera" means one trillion, following the SI prefix system: kilo (10^3), mega (10^6), giga (10^9), tera (10^12).
Maya Singh studies the electromagnetic spectrum in physics class. Her textbook lists infrared radiation starting at about 0.3 THz. Converting: 0.3 x 10^12 = 300,000,000,000 Hz (300 billion hertz or 300 GHz). She notes this is about 15,000 times higher than the highest FM radio frequency (108 MHz), which Tom Brewer helps her visualize as the vast expanse of the electromagnetic spectrum.
Terahertz Frequency Reference Table
| THz | Hz | Context |
|---|---|---|
| 0.1 THz | 100,000,000,000 | Lower THz band boundary |
| 0.3 THz | 300,000,000,000 | Airport body scanner |
| 1 THz | 1,000,000,000,000 | Spectroscopy range |
| 3 THz | 3,000,000,000,000 | Medical imaging |
| 10 THz | 10,000,000,000,000 | Upper THz band |
| 30 THz | 30,000,000,000,000 | Far infrared |
| 400 THz | 400,000,000,000,000 | Red visible light |
| 790 THz | 790,000,000,000,000 | Violet visible light |
Practical Applications
Security and Screening
Airport body scanners use frequencies around 0.1-0.3 THz (100-300 billion Hz). These waves pass through clothing but reflect off skin and metallic objects, creating images without ionizing radiation. Priya Patel writes about this technology for a security company client, explaining that 0.25 THz = 250,000,000,000 Hz, far below the frequency of harmful X-rays (30,000,000 THz).
Scientific Spectroscopy
Terahertz spectroscopy identifies chemical compounds by their unique absorption signatures at 0.1-3 THz. Many molecules have rotational and vibrational modes in this frequency range. Tom Brewer encountered terahertz testing during his engineering career when evaluating coating thickness on turbine blades non-destructively at about 1.5 THz (1.5 trillion Hz).
Future Wireless Communications
Researchers exploring 6G wireless technology target frequencies above 0.1 THz for ultra-high-speed data links. At 0.3 THz (300 billion Hz), data rates could exceed 100 Gbps, compared to 5G peak rates of about 20 Gbps. Maya Singh reads about these developments for a science report, noting that the challenge is THz signal absorption by atmospheric water vapor, which limits range to short distances.