TUNGSTITE

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.

MICROWAVES

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

INTERFERENCE

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

LASER

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

ULTRASONICS

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

PERIGEE

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

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.