alleryThe refractive index of water is 1.33. The speed of light in water (in m/s) is approximately:
A1.33 × 10⁸
B3.0 × 10⁸
C4.5 × 10⁸
D2.26 × 10⁸
Answer & Solution
Correct answer: D. 2.26 × 10⁸
1. v = c/n = (3 × 10⁸)/1.33.
2. Calculation: 3 × 10⁸ ÷ 1.33 ≈ 2.26 × 10⁸ m/s.
3. Hence light slows to ~226,000 km/s in water.
_Source: syllabus Science, Ch 9 "Light Reflection and Refraction", §9.3.1_
Keep practising Refraction of Light and Lenses
Browse all Refraction of Light and Lenses questions for Andhra Pradesh SSC (Class 10), or explore more Science topics.
Related questions
A child cannot read words on the blackboard clearly. The likely defect and correction are:The image formed on the retina by the human eye is:Scattering of light is most pronounced when the wavelength of light is:A 10-cm-tall object placed 30 cm in front of a 20-cm concave mirror has an image at:Cataract refers to:A myopic person's far point is 50 cm. The corrective lens has power:Tyndall effect refers to:The phenomenon of dispersion was first scientifically demonstrated by: