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Polaroid is a brand of sunglasses that is related to the Polaroid Corporation and was founded by Dr. Edwin Land in 1937.

Seach Polaroid Eyewear for website or view the range at:

www.polaroidsunglasses.co.uk

Polaroids are thin and large sheets of crystalline polarising material (made artificially) capable of producing plane polarised beams of large cross section.

As early as 1852, it was discovered by researchers that synthetic small needle-shaped crystals of iodosulphate of quinine possess the property of polarising light. These crystals are not stable. A Polaroid sheet is prepared from the suspension of these crystals of nitrocellulose. To impart stability, its thin sheet is mounted between two sheets of glass or celluloid.

It can also be obtained by stretching a thin sheet of polyvinyl alcohol strained with iodine. When such a sheet is subjected to a large strain, the molecules get oriented in the direction of applied strain. If the stretched sheet of polyvinyl alcohol is heated in the presence of a dehydrating agent such as hydrochloric acid, it becomes strongly stable. Each polaroid sheet is enclosed between thin glass plates so as to provide mechanical support.

Polaroids are of two types. H-polaroid and the k-polaroid. The main difference is that k-polaroid are not strained with iodine.

ANSWER II: A light wave vibrating in more than one plane is referred to as unpolarised light. Polarised light waves are those in which the vibrations occur in a single plane. It is possible to transform unpolarised light into a polarised one and this process is called polarisation.

A Polaroid filter is able to polarize light because of the chemical composition of the filter material. The molecules of the filters are all oriented along the same direction so that they all absorb light of the same polarisation.

When light reflects from a horizontal surface at an angle, the reflected light tends to be polarised horizontally. At a specific angle, the light is completely horizontally polarised because any vertically polarised light that hits the surface at this angle is allowed to enter the surface without reflection. Since reflections from horizontal surfaces are mostly horizontally polarised, glare is mostly horizontally polarised.

Polarising sunglasses deliberately block horizontally polarised light to reduce glare. There are several types of lens material. CR-39 is a plastic made from hard resin that meets optical quality standards. Polycarbonate is a synthetic plastic material that has great strength and is very lightweight.

Eyeglasses that darken when exposed to the sun are called photochromatic. Photochromatic lenses rely on a specific chemical reaction to UV radiation.

These lenses have millions of molecules of substances, such as silver chloride or silver halide, embedded in them. The molecules are transparent to visible light in the absence of UV light. But when exposed to UV rays in sunlight, the molecules undergo a chemical process that causes them to change shape. The new molecular structure absorbs portions of the visible light, causing the lenses to darken. The number of the molecules that change shape varies with the intensity of the UV rays.

When we go indoors and out of the UV light, the reverse chemical reaction takes place. The sudden absence of UV radiation causes the molecules to return to their original shape, resulting in the loss of their light absorbing properties.

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13y ago
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12y ago

a polaroid camera is a camera tht once u take a picture, it prints out a small hard cover of the picture. they had lots back in the old days nd there r only a couple left, but u buy 1 at target 4 lik $97? som where around tht, hoped this helped!

p.s. the 1's nowadays arent tht pretty

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13y ago

Yes. Polaroid sells digital cameras and digital hybrids. They discontinued the instant film cameras 2008 but introduced a model, the Polaroid Classic Instant 300, in the spring of 2010. The 300 retails for $89.99, and uses 100 pack film that costs $9.99 for 10 sheets, about $1.00 per picture.

You can also buy used Polaroid cameras for almost nothing, but if you buy one be sure it accepts 100-pack film, as all other Polaroid film and instant film products have been discontinued.

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13y ago

The Polaroid name is forever attached to instant film Photography. A Polaroid instant camera would develop a picture before your very eyes in about one minute.

Poladroid refers to creating Polaroid-like pictures from your regular digital pictures.

http://www.poladroid.net/

http://en.wikipedia.org/wiki/Polaroid

http://www.Flickr.com/groups/poladroid/

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Q: Are there still Polaroid cameras
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Related questions

Is there any place that still sales Polaroid picture camera's?

You can visit www.polaroid.com to purchase Polaroid cameras.


The first what went on sale on 28 November 1948?

Polaroid Cameras


Is digital the only type of camera's sold now?

Film cameras are still widely availbale as are Polaroid cameras.


Does Polaroid still make cameras?

Yes Polaroid still makes cameras however they differ from their old film models. In fact, the cameras that they make currently are strictly digital. With 75 years of experience, today the company produces extremely competitive and high quality digital camera products.


Do guys buy polaroid cameras?

yes! it is completely normal and cool for guys to buy polaroid cameras by the way. :-)


What is the difference between the different polaroid spectra cameras?

The best place for information on the Polaroid Spectra cameras is camerapedia.org.


What is the meaning of polaroid?

pictures printed out of polaroid cameras just after taken


Where can you donate polaroid cameras?

You can donate Polaroid cameras to The Instant Film Society. http://instantfilmsociety.com/wp/?p=1608


Where can I find information on Polaroid cameras?

The Polaroid website might be a good place to start. Polaroids have feel somewhat out of touch with today's consumer due to the rise of digital cameras, but there is still plenty of information out there on Polaroid. Many specialty stores out there deal exclusively in Polaroid and they have experts on hand that can give you endless information on the timeless company.


What is the meaning of polaroid photos?

pictures printed out of polaroid cameras just after taken


What film does a Polaroid 305 Land camera use?

All the Polaroid 300-series cameras use Series 100/660 Pack film, which is still manufactured and is available in 10-packs from Polaroid or FujiFilm.


What was the innovation of Polaroid digital cameras?

Polaroid is known internationally as a company that develops digital cameras, camcorders, and more. The unique innovation that is credited to Polaroid was the invention of instant photo printing.