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In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. The emerging coloration is a form of structural coloration. The directions of these beams depend on the spacing of the grating and the wavelength of the light so that the grating acts as the dispersive element. Because of this, gratings are commonly used in monochromators and spectrometers.

For practical applications, gratings generally have ridges or rulings on their sur ....etc

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Physics Lab Viva Voce Questions and its answers Laser Parameters



1. What is semi conductor diode laser?
Semiconductor diode laser is a specially fabricated pn junction diode. It emits laser light when it is
forward biased.

2. What is LASER?
The term LASER stands for Light Amplification by Stimulated Emission of Radiation. It is a device
which produces a powerful, monochromatic collimated beam of light in which the waves are coherent.

3. What are the characteristic of ....etc

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C viva questions

1. Who developed the C language?
2.How do you comment on program C?
3. How is the name C derived?
4. What is K & R C?
5. What is the preprocessor declaration?
6. Differentiate between constant and variable.
7.What is the type of data?
8. Name the basic data types of C.
9.Differentiate between string constant and character constant.
10. What is the integer, char, float range for a 16-bit computer?
11. What is a statement?
12. What is a keyword?
13.Difference between keywords and identifiers.
14. What is th ....etc

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The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and a magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879.
The Hall coefficient is defined as the ratio of the induced electric field to the product of the current density and the applied magnetic field. It is a characteristic of the material from which the conductor is made, since its value depends on the type, number, and properties of the charge carri ....etc

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