)
Answers
Step-by-step explanation:
Refractive index of water = 4/3
▪ Speed of light in air = 3×10^8
8
m/s
To Find :
▪ Speed of light in water.
Concept :
✒ Refractive index of medium is defined as the ratio of speed of light in air to the speed of light in medium.
✒ Refractive index is an unitless as well as dimensionless quantity.
Mathematically,
\bigstar\:\underline{\boxed{\bf{\red{n=\dfrac{v_{air}}{v_{medium}}}}}}★
n=
v
medium
v
air
Calculation :
\begin{lgathered}\implies\sf\:n_{water}=\dfrac{v_{air}}{v_{water}}\\ \\ \implies\sf\:\dfrac{4}{3}=\dfrac{3\times 10^8}{v_{water}}\\ \\ \implies\sf\:v_{water}=\dfrac{3\times 3\times 10^8}{4}\\ \\ \implies\underline{\boxed{\bf{\purple{v_{water}=2.25\times 10^8\:mps}}}}\end{lgathered}
⟹n
water
=
v
water
v
air
⟹
3
4
=
v
water
3×10
8
⟹v
water
=
4
3×3×10
8
⟹
v
water
=2.25×10
8
mps
_______________________
▶ Milestone-1)
Answer:
√6÷(√3-√2) = 8mps
Step-by-step explanation:
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