science
Grade-7
Easy
Question
Which of the following has the minimum value of refractive index?
- Glass
- Water
- Air
- Sesame oil
Hint:
Refractive index of medium increases with density.
The correct answer is: Air
The correct answer is c)Air. The refractive index of air is 1 which is the minimum as refractive index can not be lower than 1.
The refractive index of glass is 1.52.
The refractive index of water is 1.333.
The refractive index of sesame oil is 1.47.
Which means the refractive index of glass is the highest , followed by sesame oil then water and at last is air.
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