A transparent medium has relative permeability μᵣ = 1.0 and relative permittivity εᵣ = 1.44. Speed of light in the medium is:
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Question

A transparent medium has relative permeability μᵣ = 1.0 and relative permittivity εᵣ = 1.44. Speed of light in the medium is:

G1 Physics · Accepted Answer

Step 1: Light speed in a medium v = c/√(μᵣεᵣ). Step 2: √(1 × 1.44) = 1.2. Step 3: v = (3 × 10⁸)/1.2 = 2.5 × 10⁸ m/s (option A). Final answer: (A) 2.5 × 10⁸ m/s.