Question

hi shikha...answer that what is the speed of light in air and water....??

Answer 1

speed of light in air or vaccum
$= 3 \times {10}^{8} m {s}^{ - 1}$
speed of light in water is approximately 3/4 of speed of light in vaccum or air,i.e.,
$= 2.25 \times {10}^{8}$m/s

Answer 2

$speed \: of \: light \: = 3 \times 10 {}^{8} \\ speed \: oflight \: in \: water \: = 2.25 \times 10 {}^{8}$