Important Ray Optics Relations
### Refraction
$$\mu_1\sin i=\mu_2\sin r$$
### Mirror Formula
$$\frac1f=\frac1v+\frac1u$$
### Lens Formula
$$\frac1f=\frac1v-\frac1u$$
### Lens Power
$$P=\frac1f$$
### Prism Formula
$$\mu=\frac{\sin\frac{A+D_m}{2}}{\sin\frac A2}$$
### Critical Angle
$$\sin C=\frac1\mu$$
### Usage
- Quick formula revision.