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Tuesday, 30 October 2012


Tungstite is a powdery and earthy mineral. Its colour is yellowish green or bright yellow. It is soluble in alkaline solutions and not soluble in acidic solutions.

Sunday, 21 October 2012


Microwaves are electromagnetic waves of wavelengths ranging from 30 cm to 0.3mm. Frequency range is 109Hz to 1012Hz.

Tuesday, 16 October 2012


The superposition of two or more light waves and redistribution of energies is termed as interference of light.

Thursday, 11 October 2012


Laser(Light Amplification by Stimulated Emission of Radiation) is a light source which gives highly directional, coherent, monochromatic, intense light.

Wednesday, 10 October 2012


Ultrasonics are sound waves with frequency greater than that of human audibility limit, 20KHz.

Tuesday, 9 October 2012


Perigee-The point in a satellite's elliptical orbit that is closest to the earth, and at which the satellite's velocity is greatest.


Fractal-a geometric shape that repeats itself, at least roughly, at all scales. Fractals are used for the complex modelling of clouds and other natural shapes.