- Optical glass prism is a transparent optical element with flat, polished surfaces that refract light.
- This traditional geometrical shape of an optical prism is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type.
- This dispersive prism is used to break up light into its constituent spectral colors because the refractive index depends on the frequency. The white light entering the prism is a mixture of different frequencies, each of which gets bent slightly differently. Blue light is slowed more than red light and will be bent more than red light.
- Size: 30mm x 30mm x 60mm
- This prism is perfect to explain and show the dispersion of white light into the visible light spectrum to the kids at home.
- It is a great educational science product that kids can learn and play with.
How it works?
Light changes speed as it moves from one medium to another (for example, from air into the glass of the prism). This speed change causes the light to be refracted and to enter the new medium at a different angle (Huygens principle).
The degree of bending of the light's path depends on the angle that the incident beam of light makes with the surface, and on the ratio between the refractive indices of the two media (Snell's law). The refractive index of many materials (such as glass) varies with the wavelength or color of the light used, a phenomenon known as dispersion.
This causes the light of different colors to be refracted differently and to leave the prism at different angles, creating an effect similar to a rainbow. This can be used to separate a beam of white light into its constituent spectrum of colors. A similar separation happens with iridescent materials, such as a soap bubble.