Plzz answer fast guys...
If it's correct I will mark u as brainliest
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1
Answer:
it is quite simple that
refractive index= speed of light in vacuum / speed of light in medium
on putting values in it we will get
2.42=3x10^8/x
x=3x10^8 /2.42
x= 1.2396 x 10^8
hope it will help
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