Uploaded July 2025 | Updated September 2026, 1 week ago

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Fresnel rhomb prisms manipulate the polarization of light, or the orientation of the light waves moving through space

Watch to see how a Fresnel rhomb affects a laser

Light is an electromagnetic wave made of electric and magnetic fields that vibrate as the wave moves forward

In linearly polarized light, these vibrations stay in one fixed direction. But when we pass that light through a Fresnel rhomb, the light reflects just right inside the prism, delaying one part of the wave

This changes the straight-line vibration into a smooth spiral called circular polarization, all from a cleverly crafted piece of glass

#optics #science #physics #stem #photonics #laser #engineering