Important Ray Optics Relations

Rarely Tested

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.

No related questions available for this formula yet.

Go back to topics

Join CAT 2026 course by 5-Time CAT 100%iler

Start your IIM journey with the right preparation and crack CAT 2026.