Question

the absolute refractive index of a certain material is 1.7 . find the speed of light in this material.plz answer fast.​

Answer 1

$\huge\underline\blue{\sf Answer:}$

$\large\red{\boxed{\sf v_{material}=1.7×{10}^{8}m/s }}$

$\huge\underline\blue{\sf Solution:}$

$\large\underline\pink{\sf Given: }$

• Refractive index ($\sf{\mu =1.7}$)

• Speed of light (c)=$\sf{3×{10}^{8}m/s}$

$\large\underline\pink{\sf To\:Find: }$

• Speed of light in material ($\sf{v_{material}=?}$)

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We know that ,

$\large{♡}$$\large{\boxed{\sf \mu={\frac{c}{v_{material}}}}}$

On putting value :

$\large\implies{\sf 1.7={\frac{3×{10}^{8}}{v_{material}}}}$

$\large\implies{\sf v_{material}={\frac{3×{10}^{8}}{1.7}} }$

$\large\implies{\sf v_{material}=1.7×{10}^{8}m/s}$

$\huge\red{♡}$$\large\red{\boxed{\sf v_{material}=1.7×{10}^{8}m/s }}$