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Physics Lab Viva Voce Questions and its answers Laser Parameters


Posted by: seminar addict
Created at: Monday 16th of January 2012 03:57:19 AM
Last Edited Or Replied at :Monday 12th of May 2014 11:34:12 AM
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3.What are interference fringes?
They are alternately bright and dark patches of light obtained in the region of superposition of two wave
trains of light.


SPECTROMETER GRATING

1.what is plane transmission diffraction grating?
A plane transmission diffraction grating is an optically plane parallel glass plate on which equidistant,
extremely close grooves are made by ruling with a diamond point.

2. In our experiment. What class of diffraction does occur and how?
Fraunhofer class of diffraction occurs. Since the spectrometer is focused for parallel rays, ..................[:=> Show Contents <=:]



laser full report


Posted by: project report tiger
Created at: Saturday 13th of March 2010 08:23:15 PM
Last Edited Or Replied at :Wednesday 16th of March 2011 11:01:24 PM
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t a beam parallel to the barrel. Since a laser beam by definition has low divergence. The laser light appears as a small spot even at long distances; the user places the spot on the desired target and the barrel of the gun is aligned (but not necessarily allowing for bullet drop, windage and the target moving while the bullet travels).

A radar gun or speed gun is a small Doppler radar unit used to detect the speed of objects, especially trucks and automobiles for the purpose of regulating traffic, as well as pitched baseballs, runners or other moving objects in spor..................[:=> Show Contents <=:]



Laser communication systems


Posted by: jyothsnas
Created at: Sunday 17th of January 2010 10:04:00 AM
Last Edited Or Replied at :Saturday 18th of February 2012 05:16:15 AM
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plzzzzzzzzz post the technical seminars topi..................[:=> Show Contents <=:]



low power design in vlsi


Posted by: meghasb
Created at: Friday 06th of November 2009 05:22:01 AM
Last Edited Or Replied at :Tuesday 21st of September 2010 05:59:37 AM
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pls send me pdf of this topic a..................[:=> Show Contents <=:]



Online Product Master Maintenance System


Posted by: Electrical Fan
Created at: Wednesday 02nd of September 2009 04:00:20 PM
Last Edited Or Replied at :Wednesday 02nd of September 2009 04:00:20 PM
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Online Product Master Maintenance System

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Online Product Master Maintenance System


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This project is aimed at developing an online product master maintenance system used in a manufacturing industry. The Product Master Maintenance (PMM) is a client server based application that can be accessed by a selected group of users. This system can be..................[:=> Show Contents <=:]



Sensitive skin


Posted by: Computer Science Clay
Created at: Monday 27th of April 2009 01:00:54 PM
Last Edited Or Replied at :Friday 10th of February 2012 01:00:12 AM
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ities, which can be used to cover the entire surface of a machine or even a part of a human body. Depending on the skin electronics, it endows its carrier with an ability to sense its surroundings via the skinâ„¢s proximity, touch, pressure, temperature, chemical/biological, or other sensors. Sensitive skin devices will make possible the use of unsupervised machines operating in unstructured, unpredictable surroundings among people, among many obstacles, outdoors on a crowded street, undersea, or on faraway planets. Sensitive skin will make machines cautious and thus friendly to their envi..................[:=> Show Contents <=:]



Tunable Lasers


Posted by: computer science crazy
Created at: Tuesday 07th of April 2009 01:15:11 PM
Last Edited Or Replied at :Thursday 10th of February 2011 06:16:03 AM
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a time. While not the ideal solution, this still cuts your required number of spare lasers down. More advanced solutions hope to be able to cover larger number of wavelengths, and should cut the cost of spares even further.
The devices themselves are still semiconductor-based lasers that operate on similar principles to the basic non-tunable versions. Most designs incorporate some form of grating like those in a distributed feedback laser. These gratings can be altered in order to change the wavelengths they reflect in the laser cavity, usually by running electric current through them, thereb..................[:=> Show Contents <=:]



Free Space Laser Communications


Posted by: computer science crazy
Created at: Monday 22nd of September 2008 12:11:49 AM
Last Edited Or Replied at :Tuesday 05th of February 2013 12:32:14 PM
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erence is lost. Instability of the platforms also causes uncertainty in time. In the ideal acquisition method, the beam width of the source is greater than the angle of uncertainty in the location of receiver. The receiver field of includes the location uncertainty of the transmitter. Unfortunately, this ideal method requires a significant amount of laser power.

It is possible to operate a number of laser types at high peak power and low duty cycle to make acquisition easier. This is because a lower pulse rate is needed for acquisition than for tracking and communications. High peak power p..................[:=> Show Contents <=:]



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