CBSE BoardEnglish MediumSTD 10ScienceLight – Reflection and Refraction1 Mark
MCQ
The refractive index of water is :
✓
$1.33$
B
$1.50$
C
$2.42$
D
$1.36$
✓
Answer
Correct option: A.
$1.33$
Velocity of light in water $= 225,563,010m/ s$
Velocity of light in air $= 300,000,000m/ s$
$\text{Refractive index}=\frac{\text{Velocity of light in air}}{\text{Velocity of light in water}}$
Refractive index $=\frac{300,000,000}{225,563,010}$
Refractive index $=1.33$
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