Opticalprism

When light is scattered due to particles in its path, it is called Tyndall effect. The way a beam of sunlight becomes visible when it passes through dust particles in a room, when sunlight passes through a canopy of dense forest etc., are examples of Tyndall effect.

In 1859, Tyndall discovered that when white light is passed through clear liquid having small suspended particles, then the blue colour of white light has shorter wavelength and is scattered more than the red colour that has longer wavelength.

Opticaprism

Visit our Fiber Optics section and shop from our ever-growing selection of patch cables such as 62.5/125 or 50/125 Multimode, Singlemode with any combination of LC, SC, ST, FC, MPO and MTRJ connectors. Of course we also carry a complete line of OM1, OM2 as well as 10GB OM3 and OM4 up to 100 Meters  Don’t see the fiber cable you need pre-made? Not a problem with our custom calculator, which allows you to build your fiber to exact specification! See our assortment of pre-made and customizable patch panels, collection of fiber couplers and termination boxes. Don’t forget our networking converters and MPO trunks, cassettes, and fan-out kits we even carry fiber optic cleaning supplies!

Spectrum of white light: The band of seven colours formed when a beam of white light is passes through a glass prism is called spectrum of white light.

Rainbow is formed when it is raining at the time of sunshine. When the white sunlight falls on the raindrops and leaves them, then the white light is refracted and an arc of seven colours is formed in the sky. In this situation, tiny raindrops act as glass prism splitting the white sunlight.

LED (Light Emitting Diode)- LEDs are small scale, often less than 1mm squared, complex semiconductors. They create light via electron recombination, a process in which electrons recombine with electron holes within the device, releasing light energy. In fiber optics LEDs are utilized for their convenient size, affordable price range, and high luminescence. LEDs are not capable of super high modulation speeds and reach mid-range bandwidths, making them appropriate for multi-mode fiber and relatively shorter cable runs.

Refraction byprism

Let’s take some time to discuss the devices that put the “optic” in fiber optic technology- the light sources, or, as they are sometimes referred to, the optic transmitters. Currently, commercially available fiber optic technologies may utilize one of three types of light source- laser, LED, or VCSEL. Below you will find brief explanation of each light source and its given practicalities in fiber optics.

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The light from stars is refracted as it comes down into earth’s atmosphere. The air higher up in the sky is rarer and near the earth’s surface is denser. As the star light falls down the dense air bends it more and thus stars appear higher than they actually are.

The dispersion of white light happens because the angle of refraction of lights of different colours is different while passing through the transparent medium. For example, red colour deviates least and is formed at the upper part of the spectrum and violet colour is deviated maximum and is formed at the bottom of the spectrum.

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Laser (Light Amplification by Stimulated Emission of Radiation)- Didn’t know that was acronym? Well it is, and beyond just being fun to play with, lasers play a crucial role in many fiber systems. In the most basic of terms, lasers work by creating a focused source of one frequency (or color) of light that moves in only one direction. Lasers in fiber optics are valued for their long life spans, high modulation speed (the turning on and off of light), and high-bandwidth capabilities. Lasers do however come at a higher cost and are more difficult to calibrate then other light sources.

Prism

When a ray of light enters the glass prism it gets deviated two times. First when it enters the glass prism and second when it comes out of the prism. This is because the refracting surfaces of the prism are not parallel to each other. Also, when the ray of light passes through the prism it bends towards its base.

In 1665, Isaac Newton discovered that white light consists of seven colours. He found that if a beam of white light is passed through glass prism then it will split in to seven colours. These colours are red, orange, yellow, green, blue, indigo and violet (VIBGYOR).

Rectangularprism

Light Sources     Let’s take some time to discuss the devices that put the “optic” in fiber optic technology- the light sources, or, as they are sometimes referred to, the optic transmitters. Currently, commercially available fiber optic technologies may utilize one of three types of light source- laser, LED, or VCSEL. Below you will find brief explanation of each light source and its given practicalities in fiber optics.      Laser (Light Amplification by Stimulated Emission of Radiation)- Didn’t know that was acronym? Well it is, and beyond just being fun to play with, lasers play a crucial role in many fiber systems. In the most basic of terms, lasers work by creating a focused source of one frequency (or color) of light that moves in only one direction. Lasers in fiber optics are valued for their long life spans, high modulation speed (the turning on and off of light), and high-bandwidth capabilities. Lasers do however come at a higher cost and are more difficult to calibrate then other light sources.       LED (Light Emitting Diode)- LEDs are small scale, often less than 1mm squared, complex semiconductors. They create light via electron recombination, a process in which electrons recombine with electron holes within the device, releasing light energy. In fiber optics LEDs are utilized for their convenient size, affordable price range, and high luminescence. LEDs are not capable of super high modulation speeds and reach mid-range bandwidths, making them appropriate for multi-mode fiber and relatively shorter cable runs.      VCSEL (Vertical Cavity Surface Emitting Laser)- VCSELs (pronounced ‘vixel’) emerged in the 80’s as a new kind of semi-conductor laser and were soon recognized for their potential in fiber optics. When Gigabit Ethernet products were developed LEDs could not modulate (turn on and off) at required speeds and standard lasers proved too expensive- enter VCSEL, which modulates at high speeds at cheaper costs. In turn, multimode fibers that could transmit laser had to be developed, these laser-optimized fibers are the OM3 and OM4 cables that we know and use today.    < Back to Fiber Optics Explained Main Page   At Cables For Less we offer a variety of high quality Fiber Optic solutions at great prices! Visit our Fiber Optics section and shop from our ever-growing selection of patch cables such as 62.5/125 or 50/125 Multimode, Singlemode with any combination of LC, SC, ST, FC, MPO and MTRJ connectors. Of course we also carry a complete line of OM1, OM2 as well as 10GB OM3 and OM4 up to 100 Meters  Don’t see the fiber cable you need pre-made? Not a problem with our custom calculator, which allows you to build your fiber to exact specification! See our assortment of pre-made and customizable patch panels, collection of fiber couplers and termination boxes. Don’t forget our networking converters and MPO trunks, cassettes, and fan-out kits we even carry fiber optic cleaning supplies!

A glass prism is a transparent object having two triangular ends and three rectangular sides. The refraction of light in glass prism is different from a glass slab. This is because in glass prism, the incident ray of light is not parallel to emergent ray of light.

Dispersion of light: The splitting of white light into seven colours on passing through a transparent medium is called dispersion of light.

The seven coloured lights recombine to form white light due to second glass prism which is placed in a reversed position.

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When the refraction of light takes place due to earth’s atmosphere it is called atmospheric refraction. So, when light ray enter the atmosphere there is air and every air layer has different temperature. These air layers have different optical densities. Cooler air layer is an optically denser medium for light rays whereas warmer air layer is optically rarer medium for light rays.

Stars twinkle at night because their light is refracted in the atmosphere. When the light of star enters the earth’s atmosphere it undergoes refraction due to different optical densities of the air. Therefore, stars appear bright at one moment and dim in another.

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A spectrum of seven colours of lights can be recombined to form back white light. This can be done by placing two glass prisms side by side. But, place the second glass prism in an inverted position. When white light passes through first prism it disperses the light into seven colours and when this beam of light enters the second prism which is placed in an inverted position, a white light is obtained when it comes out of the second prism.

It is due to refraction of light that we are able to see the sun two minutes before sunrise and two minutes after actual sunset. At the time of sunrise the sunlight is coming from less dense air to more dense air. In this case the sunlight is refracted downwards and because of this sun appears to be raised above the horizon than it actually is.

VCSEL (Vertical Cavity Surface Emitting Laser)- VCSELs (pronounced ‘vixel’) emerged in the 80’s as a new kind of semi-conductor laser and were soon recognized for their potential in fiber optics. When Gigabit Ethernet products were developed LEDs could not modulate (turn on and off) at required speeds and standard lasers proved too expensive- enter VCSEL, which modulates at high speeds at cheaper costs. In turn, multimode fibers that could transmit laser had to be developed, these laser-optimized fibers are the OM3 and OM4 cables that we know and use today.