Calculadora de Índice de Refração

The refractive index calculator determines the value of n, which measures how light propagates in a material medium. The refractive index is the ratio of the speed of light in vacuum (c, approximately 3 × 10⁸ m/s) to the speed of light in the medium (v). The higher the index, the more the medium slows down light and bends it upon entry. This relationship is fundamental for understanding phenomena such as refraction, total internal reflection, and light dispersion.

To use the calculator, enter the speed of light in the medium in meters per second. The result will be the refractive index, a dimensionless number. For example, for water, the speed of light is about 2.25 × 10⁸ m/s, yielding n ≈ 1.33. The calculation is straightforward: divide c by the entered value. This tool is useful for physics students, engineers, and optics professionals who need to verify material properties.

When to use this calculator? In situations involving lenses, prisms, optical fibers, or any system that depends on light refraction. For instance, when designing eyeglass lenses, the refractive index of the material determines the bending power of light rays. It is also useful in laboratories to characterize transparent substances such as glasses, plastics, and liquids.

Important considerations: the refractive index varies with the wavelength of light (chromatic dispersion) and with the temperature of the medium. Tabulated values usually refer to sodium yellow light (589 nm) at 20 °C. Make sure to use the correct speed for the specific condition. Also, remember that the refractive index of vacuum is exactly 1, and for air it is approximately 1.0003.