Question

Which of the following has the lowest refractive index?

• A. Turpentine
• B. Benzene
• C. Water
• D. Kerosine

Hint:

A lower refractive index means the medium is less optically dense, allowing light to travel faster through it.

Answer 1

The Correct Option is C

Step 1: Understanding refractive index.
The refractive index (n) of a medium determines how much light bends when it enters the medium from air. A lower refractive index means light bends less.
Step 2: Comparing refractive indices.
The approximate refractive indices of the given substances are:
- Water: \( n \approx 1.33 \) (Lowest)
- Kerosene: \( n \approx 1.44 - 1.48 \)
- Benzene: \( n \approx 1.50 \)
- Turpentine: \( n \approx 1.47 \)
Step 3: Conclusion.
- Water has the lowest refractive index among the given options.
- Hence, the correct answer is (C) Water.