<P> Each Morse code symbol represents either a text character ( letter or numeral ) or a prosign and is represented by a unique sequence of dots and dashes . The duration of a dash is three times the duration of a dot . Each dot or dash is followed by a short silence , equal to the dot duration . The letters of a word are separated by a space equal to three dots ( one dash ) , and the words are separated by a space equal to seven dots . The dot duration is the basic unit of time measurement in code transmission . To increase the speed of the communication , the code was designed so that the length of each character in Morse varies approximately inversely to its frequency of occurrence in English . Thus the most common letter in English , the letter `` E '' , has the shortest code , a single dot . </P>
<P> Each Morse code symbol represents either a text character ( letter or numeral ) or a prosign and is represented by a unique sequence of dots and dashes . The duration of a dash is three times the duration of a dot . Each dot or dash is followed by a short silence , equal to the dot duration . The letters of a word are separated by a space equal to three dots ( one dash ) , and the words are separated by a space equal to seven dots . The dot duration is the basic unit of time measurement in code transmission . To increase the speed of the communication , the code was designed so that the length of each character in Morse varies approximately inversely to its frequency of occurrence in English . Thus the most common letter in English , the letter `` E '' , has the shortest code , a single dot . </P>
in morse code which letter is represented by a single dot
in morse code which letter is represented by a single dot
E
E