Light Energy — Formula Sheet

\frac{\sin i}{\sin r} = \text{constant}

\mu = \frac{\text{Speed of light in first medium}}{\text{Speed of light in second medium}}

\mu = \frac{\sin i}{\sin r} = \frac{3 \times 10^{8}}{2.25 \times 10^{8}} = \frac{4}{3} = 1.33

\mu = \frac{\sin i}{\sin r} = \frac{3 \times 10^{8}}{2 \times 10^{8}} = 1.5

Focal length = \frac{1}{2} \times Radius of curvature

Speed of light in air = 3×10^8 m/s

Speed of light in water = 2.25×10^8 m/s

Speed of light in glass = 2×10^8 m/s

Refractive index of water with respect to air = 4/3 = 1.33

Refractive index of glass with respect to air = 1.5