Many people don't know what the abbreviations stand for — or how we should refer to noon and midnight. In particular, am stands for ante meridiem, which translates into english as ‘before midday’ Meanwhile, pm is post meridiem and means in english ‘after midday’ Am and pm are the abbreviated terms for ante meridiem and post meridiem respectively While am represents the time from midnight to 11:59 noon, and pm represents the time from 12 noon to 11:59 midnight. We can use any abbreviation, including am, a.m., am, or a.m., to denote the ante meridiem
On the other hand, pm, p.m., pm, or p.m Is the abbreviation for post meridiem. For latin ante merīdiem, meaning “before noon,” refers to the period from midnight until noon One minute before noon is 11:59 a.m One minute after noon is 12:01 p.m Many people distinguish between noon and midnight by saying 12 noon and 12 midnight.
Amplitude modulation (am) is a signal modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave In amplitude modulation, the instantaneous amplitude of the wave is varied in proportion to that of the message signal, such as an audio signal [1] this technique contrasts with angle modulation, in which either the frequency of the carrier.
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