The crack of a whip is due to its tip moving faster than the speed of sound. It makes a shock wave, a small sonic boom in the Italian countryside. A thunder clap has a similar origin. [The sound of a supersonic airplane has a similar origin as well] So why is the speed of light a barrier, any more than the speed of sound?
(Cosmos; Journeys In Space And Time; Carl Sagan)
Would you be so kind to paraphrase this bit/sentence a little, since I'm not sure how it works here?
Thanks.
(Cosmos; Journeys In Space And Time; Carl Sagan)
Would you be so kind to paraphrase this bit/sentence a little, since I'm not sure how it works here?
Thanks.