Editing Talk:2027: Lightning Distance
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:: I added a few words about the problem that a flash is not instantaneous and removed the 'incomplete' tag. Hope that's OK. [[User:Chrisahn|Chrisahn]] ([[User talk:Chrisahn|talk]]) 19:41, 2 August 2018 (UTC) | :: I added a few words about the problem that a flash is not instantaneous and removed the 'incomplete' tag. Hope that's OK. [[User:Chrisahn|Chrisahn]] ([[User talk:Chrisahn|talk]]) 19:41, 2 August 2018 (UTC) | ||
β | + | Variation of the calculation above that simplifies numeric evaluation: | |
The {{w|refractive index}} is defined as <math>n=\frac{c}{v}</math>, so <math>v=\frac{c}{n}</math> and thus <math>t=\frac{s}{v}=\frac{s\,n}{c}</math>. | The {{w|refractive index}} is defined as <math>n=\frac{c}{v}</math>, so <math>v=\frac{c}{n}</math> and thus <math>t=\frac{s}{v}=\frac{s\,n}{c}</math>. |