Question

What are some ways to measure variations in the speed of light in vacuum?

Answer 1

$\purple{hey \: mate}$
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$\bold{here \: is \: the \: ans \: of \: ur \: que}$
$the \: speed \: of \: light \: in \: vaccum \\ is \: approx \:$
' 299,792,458 ' metre per sec.............

$the \: reason \: we \: can \: put \: an \: exact \\ figure \: on \: its \: because \: the \: speed \:$
$of \: light \: in \: vaccum \: is \: a\: \\ universal \: constant \: that \\ has \: been \: measured \: with$
$lasers \: and \: when \: an \: experiment \\ involves \: laser \: it \: is \: hard \: to$
$agrue \: with \: the \: result$

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$\bold{hope \: it \: will \: help \: u}$

$\orange{thank \: you}$
$\green{be \: brainly}$
its @afsararaza

$\bold{together \: we \: go \: far}$
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:)

Answer 2

A consequence of using this definition is that any attempt to measure thespeed of light is cyclical; you must use a “meter”to measure it at some point.