Optics Fundamentals
Basic concepts in the study of light.
The core phenomena of geometric and wave optics: reflection, refraction, diffraction, interference, dispersion and lenses, with Snell's law, total internal reflection, polarization, scattering, refractive index, the thin lens equation and thin-film interference.
Use it when
- You need a precise definition of an optical phenomenon.
- You are explaining how a lens, prism or fiber behaves.
Watch out for
- Geometric optics (rays) is an approximation that fails when features are comparable to the wavelength; wave optics is needed for diffraction and interference.
- Refractive index depends on wavelength, which is what produces dispersion.
The data
16 rows
| Concept | Description |
|---|---|
| Reflection | Light bouncing off a surface. |
| Refraction | Bending of light as it passes between media. |
| Diffraction | Spreading of light around obstacles or apertures. |
| Interference | Combination of light waves producing reinforcement or cancellation. |
| Dispersion | Separation of light into colors by wavelength. |
| Lens | Transparent object that refracts light to form images. |
| Snell's Law | Relates the angles of incidence and refraction to the refractive indices: n1 sin(theta1) = n2 sin(theta2). |
| Refractive Index | The ratio of the speed of light in vacuum to its speed in a medium. |
| Total Internal Reflection | Complete reflection of light at a boundary when it travels from a denser to a less dense medium beyond the critical angle; the principle of optical fiber. |
| Critical Angle | The smallest angle of incidence at which total internal reflection occurs. |
| Polarization | Restriction of the oscillation direction of a transverse wave such as light to a particular plane. |
| Scattering | Redirection of light by particles or molecules; Rayleigh scattering of sunlight by air gives the sky its blue color. |
| Focal Length | The distance from a lens or mirror to the point where parallel rays converge. |
| Thin Lens Equation | Relates object distance, image distance and focal length: 1/f = 1/d_o + 1/d_i. |
| Thin-Film Interference | Colors produced when light reflecting from the top and bottom of a thin film interferes, as in soap bubbles and oil slicks. |
| Aberration | A departure from ideal image formation, such as spherical or chromatic aberration. |
Fields
The shape of this dataset, read from the data itself: every column, its type and a real value. Agents can use this to plan a query without fetching the whole document.
| Section | Field | Type | Example |
|---|---|---|---|
| data | concept | string | Reflection |
| data | description | string | Light bouncing off a surface. |
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