d4t_formulas/assets/formulas/optics.d4rt

[
  {
    "name": "Snell's Law",
    "description": r'''
Refraction of light when passing through different media

$$n_1 \sin(\theta_1) = n_2 \sin(\theta_2)$$

Where:
- $n_1$: Refractive index of the first medium
- $n_2$: Refractive index of the second medium
- $\theta_1$: Angle of incidence (degrees)
- $\theta_2$: Angle of refraction (degrees)

![Figure](https://upload.wikimedia.org/wikipedia/commons/thumb/5/51/Snells_law_Diagram_B_vector.svg/330px-Snells_law_Diagram_B_vector.svg.png)

Snell's Law describes how light bends when traveling between media with different refractive indices.
The product of refractive index and sine of angle remains constant across the interface.

''',
    "input": [
      {"name": "n1", "unit": "scalar"},
      {"name": "n2", "unit": "scalar"},
      {"name": "theta1", "unit": "degree"}
    ],
    "output": {"name": "theta2", "unit": "degree"},
    "d4rtCode": r"""
    var theta1Rad = theta1 * (pi / 180);
    var sinTheta2 = (n1 * sin(theta1Rad)) / n2;
    theta2 = asin(sinTheta2) * (180 / pi);
    """,
    "tags": ["physics", "optics", "light"]
  }
];