Blog



Dispersion

Posted by Luxexcel on Mar 27, 2015 11:50:00 AM

Dispersion is a phenomenon in optics where phase velocity of wave depends on its frequency. In various materials the speed of light is slower than it would be in outer space or in a vacuum.
When a light source passes through a material (for example a glass) at an angle, the light will be refracted or bent (this according to Snell’s Law and index of refraction of the material). The frequency and wavelength of the light can make the speed of light through the material vary slightly. So, each wavelength will be bent at a slightly different angle each time it passes through the material at a certain angle. Now this kind of spreading out of the ray of light is called dispersion (or chromatic dispersion). An example is seen when sunlight shines through a glass prism. This dispersion phenomenon can result in problems in lenses and this has to be minimized.

Read More

Topics: Lighting

Refractive index

Posted by Luxexcel on Mar 10, 2015 6:33:00 PM

Light can travel from one material into another as long as that material does not fully absorb, or fully reflect the light. Most of the time it travels from air into another material, or vice versa.

Read More

Topics: Lighting

Diffraction

Posted by Luxexcel on Aug 13, 2014 12:06:00 PM

Diffraction applied in lighting

Diffraction is the name for the phenomena that occur when waves of any kind, encounter obstacles that influence their behavior. The difference with refraction applied to light, is that the light is not able to travel through the object it encounters. With refraction the light changes its path, but can still travel through the medium it encounters.

Read More

Topics: Lighting

Refraction

Posted by Luxexcel on Mar 31, 2014 1:40:00 PM

The effects of refraction will be explained through an example with light travelling through air into any material, and then back out into the air again. If the light travels perpendicular to the edge of the material, the direction of the light stays the same. If the light travels at another angel than perpendicular, the path of the light will change.

Read More

Topics: Lighting

Subscribe to Luxexcel Blog Notifications