Respuesta :
The speed of light in glass is slower than the speed of light through space.
Answer: The correct answer is Option D.
Explanation:
Refractive index is defined as the ratio of speed of light in vacuum to the speed of light in medium. It is represented as [tex]\eta[/tex]. Speed of light in vacuum is always equal to [tex]3\times 10^8m/s[/tex]
Mathematically,
[tex]\eta=\frac{\text{Speed of light in vacuum}}{\text{Speed of light in medium}}[/tex]
If the refractive index is more, the speed of light in that medium will be slow and vice-versa.
As, the refractive index of glass is more than the refractive index of space. Hence, the speed of light will be slower in glass.
Therefore, the correct answer is Option D.
