Terahertz, symbolized as THz, is a unit of frequency equivalent to one trillion cycles per second, or 1,000,000,000,000 Hz. In the electromagnetic spectrum, terahertz waves occupy the fascinating territory between microwaves and infrared light. This region, often referred to as the “terahertz gap,” has long captivated scientists because of its potential in numerous applications, including advanced imaging techniques, security screening, and even the detection of defects in materials.
Remarkably, terahertz radiation is non-ionizing, meaning it is much safer for biological tissues compared to X-rays. This capability opens doors to potentially revolutionary medical imaging and diagnostics opportunities without the risk of harmful radiation exposure. As researchers continue to explore this “hidden power,” the future holds exciting prospects for terahertz technology across a multitude of fields.
Megahertz (MHz) is a common unit of frequency that represents one million cycles per second and is particularly known for its vital role in telecommunications and computing. The term hertz pays homage to Heinrich Hertz, the first person to conclusively prove the existence of electromagnetic waves. In radio broadcasting, the station dial numbers you tune into represent megahertz, which indicate the carrier frequency of the radio station. For example, a frequency of 101.1 MHz means the wave completes 101.1 million cycles every second!
In computing, the speed of the early personal computers was often measured in megahertz. Though we’ve progressed to gigahertz in modern-day processors, the megahertz era marked some groundbreaking advancements in technology. The original IBM PC, introduced in 1981, had a processor speed of just 4.77 MHz. Today, such performance pales in comparison, revealing the incredible strides in processing power over the decades.
Terahertz | Megahertz |
---|---|
0
THz
|
0
MHz
|
0.1
THz
|
100000
MHz
|
0.2
THz
|
200000
MHz
|
0.3
THz
|
300000
MHz
|
0.4
THz
|
400000
MHz
|
0.5
THz
|
500000
MHz
|
0.6
THz
|
600000
MHz
|
0.7
THz
|
700000
MHz
|
0.8
THz
|
800000
MHz
|
0.9
THz
|
900000
MHz
|
1
THz
|
1000000
MHz
|
1.1
THz
|
1100000
MHz
|
1.2
THz
|
1200000
MHz
|
1.3
THz
|
1300000
MHz
|
1.4
THz
|
1400000
MHz
|
1.5
THz
|
1500000
MHz
|
1.6
THz
|
1600000
MHz
|
1.7
THz
|
1700000
MHz
|
1.8
THz
|
1800000
MHz
|
1.9
THz
|
1900000
MHz
|
2
THz
|
2000000
MHz
|
2.1
THz
|
2100000
MHz
|
2.2
THz
|
2200000
MHz
|
2.3
THz
|
2300000
MHz
|
2.4
THz
|
2400000
MHz
|
2.5
THz
|
2500000
MHz
|
2.6
THz
|
2600000
MHz
|
2.7
THz
|
2700000
MHz
|
2.8
THz
|
2800000
MHz
|
2.9
THz
|
2900000
MHz
|
3
THz
|
3000000
MHz
|
3.1
THz
|
3100000
MHz
|
3.2
THz
|
3200000
MHz
|
3.3
THz
|
3300000
MHz
|
3.4
THz
|
3400000
MHz
|
3.5
THz
|
3500000
MHz
|
3.6
THz
|
3600000
MHz
|
3.7
THz
|
3700000
MHz
|
3.8
THz
|
3800000
MHz
|
3.9
THz
|
3900000
MHz
|
4
THz
|
4000000
MHz
|
4.1
THz
|
4100000
MHz
|
4.2
THz
|
4200000
MHz
|
4.3
THz
|
4300000
MHz
|
4.4
THz
|
4400000
MHz
|
4.5
THz
|
4500000
MHz
|
4.6
THz
|
4600000
MHz
|
4.7
THz
|
4700000
MHz
|
4.8
THz
|
4800000
MHz
|
4.9
THz
|
4900000
MHz
|
5
THz
|
5000000
MHz
|
5.1
THz
|
5100000
MHz
|
5.2
THz
|
5200000
MHz
|
5.3
THz
|
5300000
MHz
|
5.4
THz
|
5400000
MHz
|
5.5
THz
|
5500000
MHz
|
5.6
THz
|
5600000
MHz
|
5.7
THz
|
5700000
MHz
|
5.8
THz
|
5800000
MHz
|
5.9
THz
|
5900000
MHz
|
6
THz
|
6000000
MHz
|
6.1
THz
|
6100000
MHz
|
6.2
THz
|
6200000
MHz
|
6.3
THz
|
6300000
MHz
|
6.4
THz
|
6400000
MHz
|
6.5
THz
|
6500000
MHz
|
6.6
THz
|
6600000
MHz
|
6.7
THz
|
6700000
MHz
|
6.8
THz
|
6800000
MHz
|
6.9
THz
|
6900000
MHz
|
7
THz
|
7000000
MHz
|
7.1
THz
|
7100000
MHz
|
7.2
THz
|
7200000
MHz
|
7.3
THz
|
7300000
MHz
|
7.4
THz
|
7400000
MHz
|
7.5
THz
|
7500000
MHz
|
7.6
THz
|
7600000
MHz
|
7.7
THz
|
7700000
MHz
|
7.8
THz
|
7800000
MHz
|
7.9
THz
|
7900000
MHz
|
8
THz
|
8000000
MHz
|
8.1
THz
|
8100000
MHz
|
8.2
THz
|
8200000
MHz
|
8.3
THz
|
8300000
MHz
|
8.4
THz
|
8400000
MHz
|
8.5
THz
|
8500000
MHz
|
8.6
THz
|
8600000
MHz
|
8.7
THz
|
8700000
MHz
|
8.8
THz
|
8800000
MHz
|
8.9
THz
|
8900000
MHz
|
9
THz
|
9000000
MHz
|
9.1
THz
|
9100000
MHz
|
9.2
THz
|
9200000
MHz
|
9.3
THz
|
9300000
MHz
|
9.4
THz
|
9400000
MHz
|
9.5
THz
|
9500000
MHz
|
9.6
THz
|
9600000
MHz
|
9.7
THz
|
9700000
MHz
|
9.8
THz
|
9800000
MHz
|
9.9
THz
|
9900000
MHz
|
10
THz
|
1e+7
MHz
|
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