What did Marconi’s initial demonstration involve sending across the English Channel?
Answer
A simple Morse code signal
Marconi's initial groundbreaking feat involved successfully sending a simple Morse code signal across the English Channel.

Related Questions
In what year did Guglielmo Marconi successfully send signals across the Atlantic Ocean?For what achievement was Marconi awarded the Nobel Prize in Physics?Which specific technology owes its existence to Marconi’s early radio wave experimentation?What did Marconi’s initial demonstration involve sending across the English Channel?The 150th anniversary of Marconi’s birth was recognized in which year?Which Italian city is identified as a physical focal point for tracing Marconi’s origins and early experiments?Marconi’s visionary insight was characterized by his ability to turn whose theoretical waves into a practical system?Which institution actively works to keep Marconi’s memory relevant to current technological debates, such as spectrum allocation?What gap did Marconi bridge between laboratory work and societal application?What religious figure recognized Marconi by awarding him a medal?