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, 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 | Terahertz |
---|---|
0
MHz
|
0
THz
|
1
MHz
|
0.000001
THz
|
2
MHz
|
0.000002
THz
|
3
MHz
|
0.000003
THz
|
4
MHz
|
0.000004
THz
|
5
MHz
|
0.000005
THz
|
6
MHz
|
0.000006
THz
|
7
MHz
|
0.000007
THz
|
8
MHz
|
0.000008
THz
|
9
MHz
|
0.000009
THz
|
10
MHz
|
0.00001
THz
|
11
MHz
|
0.000011
THz
|
12
MHz
|
0.000012
THz
|
13
MHz
|
0.000013
THz
|
14
MHz
|
0.000014
THz
|
15
MHz
|
0.000015
THz
|
16
MHz
|
0.000016
THz
|
17
MHz
|
0.000017
THz
|
18
MHz
|
0.000018
THz
|
19
MHz
|
0.000019
THz
|
20
MHz
|
0.00002
THz
|
21
MHz
|
0.000021
THz
|
22
MHz
|
0.000022
THz
|
23
MHz
|
0.000023
THz
|
24
MHz
|
0.000024
THz
|
25
MHz
|
0.000025
THz
|
26
MHz
|
0.000026
THz
|
27
MHz
|
0.000027
THz
|
28
MHz
|
0.000028
THz
|
29
MHz
|
0.000029
THz
|
30
MHz
|
0.00003
THz
|
31
MHz
|
0.000031
THz
|
32
MHz
|
0.000032
THz
|
33
MHz
|
0.000033
THz
|
34
MHz
|
0.000034
THz
|
35
MHz
|
0.000035
THz
|
36
MHz
|
0.000036
THz
|
37
MHz
|
0.000037
THz
|
38
MHz
|
0.000038
THz
|
39
MHz
|
0.000039
THz
|
40
MHz
|
0.00004
THz
|
41
MHz
|
0.000041
THz
|
42
MHz
|
0.000042
THz
|
43
MHz
|
0.000043
THz
|
44
MHz
|
0.000044
THz
|
45
MHz
|
0.000045
THz
|
46
MHz
|
0.000046
THz
|
47
MHz
|
0.000047
THz
|
48
MHz
|
0.000048
THz
|
49
MHz
|
0.000049
THz
|
50
MHz
|
0.00005
THz
|
51
MHz
|
0.000051
THz
|
52
MHz
|
0.000052
THz
|
53
MHz
|
0.000053
THz
|
54
MHz
|
0.000054
THz
|
55
MHz
|
0.000055
THz
|
56
MHz
|
0.000056
THz
|
57
MHz
|
0.000057
THz
|
58
MHz
|
0.000058
THz
|
59
MHz
|
0.000059
THz
|
60
MHz
|
0.00006
THz
|
61
MHz
|
0.000061
THz
|
62
MHz
|
0.000062
THz
|
63
MHz
|
0.000063
THz
|
64
MHz
|
0.000064
THz
|
65
MHz
|
0.000065
THz
|
66
MHz
|
0.000066
THz
|
67
MHz
|
0.000067
THz
|
68
MHz
|
0.000068
THz
|
69
MHz
|
0.000069
THz
|
70
MHz
|
0.00007
THz
|
71
MHz
|
0.000071
THz
|
72
MHz
|
0.000072
THz
|
73
MHz
|
0.000073
THz
|
74
MHz
|
0.000074
THz
|
75
MHz
|
0.000075
THz
|
76
MHz
|
0.000076
THz
|
77
MHz
|
0.000077
THz
|
78
MHz
|
0.000078
THz
|
79
MHz
|
0.000079
THz
|
80
MHz
|
0.00008
THz
|
81
MHz
|
0.000081
THz
|
82
MHz
|
0.000082
THz
|
83
MHz
|
0.000083
THz
|
84
MHz
|
0.000084
THz
|
85
MHz
|
0.000085
THz
|
86
MHz
|
0.000086
THz
|
87
MHz
|
0.000087
THz
|
88
MHz
|
0.000088
THz
|
89
MHz
|
0.000089
THz
|
90
MHz
|
0.00009
THz
|
91
MHz
|
0.000091
THz
|
92
MHz
|
0.000092
THz
|
93
MHz
|
0.000093
THz
|
94
MHz
|
0.000094
THz
|
95
MHz
|
0.000095
THz
|
96
MHz
|
0.000096
THz
|
97
MHz
|
0.000097
THz
|
98
MHz
|
0.000098
THz
|
99
MHz
|
0.000099
THz
|
100
MHz
|
0.0001
THz
|
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