Question

Match the pair: 

Group 'A' \(\hspace{3cm}\) Group 'B' 
Substance  \(\hspace{3cm}\) Refractive index 
\(\hspace{1cm}\)  Air \(\hspace{3cm}\)      (a) \( 1.33 \) 
\(\hspace{1cm}\)  Water \(\hspace{3cm}\) (b) \( 1.46 \) 
\(\hspace{1cm}\)  Glass \(\hspace{3cm}\) (c) \( 1.0003 \) 

Hint:

Refractive index is the ratio of the speed of light in a vacuum to the speed of light in the material. The higher the refractive index, the slower light travels in that material.

Answer 1

- The refractive index of air is approximately \( 1.0003 \), which is very close to 1, as air has almost the same refractive index as a vacuum. - Water has a refractive index of about \( 1.33 \), meaning light slows down by a factor of \( 1.33 \) when it enters water from air. - Glass typically has a refractive index of around \( 1.46 \), meaning light travels slower in glass compared to both air and water.