Question

10.
The refractive index of transparent medium is greater than one because:
Speed of light in vacuum < speed of light in transparent medium
Speed of light in vacuum >speed of light in transparent medium
Speed of light in vacuum = speed of light in transparent medium
Frequency of light wave changes when it moves from rarer to denser
medium​

Answer 1

Hlo mate here is ur ans.....

Here refractive index of medium is inversely proportional to speed of light in the medium. As refractive index of vacuum is 1, speed of light is always greater in vacuum as compared to transparent medium. Hence, refractive index of transparent medium is always greater than one.....

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Answer 2

Answer :

✭ Refractive index of transparent medium is grater than one (> 1)

Refractive Index :

• Refractive index of medium is defined as the factor by which speed of light reduces as compared to the speed of light in vacuum.
• More (less) refractive index implies less (more) speed of light in that medium, which therefore is called denser (rarer) medium.

$\bigstar\:\boxed{\bf{n=\dfrac{c}{v}=\dfrac{speed\:of\:light\:in\:vacuum}{speed\:of\:light\:in\:medium}}}$

⇒ We know that, Refractive index of vaccum is 1.

⇒ ATQ, Refractive index of transparent medium is greater than 1 ( > 1).

⇒ Speed of light in vaccum has constant value (3×10$^8$ m/s) so we can say that, Refractive index of medium is inversely proportional to the speed of light in medium.

Therefore,

$\dag\:\underline{\boxed{\bf{\purple{Speed\:of\:light\:in\:vacuum>Speed\:of\:light\:in\:medium}}}}$

Learn more :

➾ When light moves from rarer to denser medium, it suffers change in speed and wavelength of light.

➾ Frequency of light remains unchanged when it gets reflecred or refracted.