light travels through water with a speed of 2.25×10^8 m/s. what is the refractive index of water if speed of light is 3×10^8 m/s.
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Answer:
Absolute refractive index: Refractive index of light in some other medium with respect to vacuum. Represented by 'n'.
Absolute refractive index (n)= (speed of light in vacuum(c))÷(speed of light in given medium(v))
(Speed of light in vacuum)÷(Speed of light in water)
⇒(3×10⁸) ÷(2.25×10⁸)
⇒3÷2.25(as 10⁸ and 10⁸ will get cancelled)
⇒1.33333.... or 4/3
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4/3
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