Light is part of the electromagnetic spectrum, which ranges from radio waves to gamma rays.This wave has amplitude, which is the brightness of the light, wavelength, which is the color of the light, and an angle at which it is vibrating, called polarization.

Gravity is the force exerted by Earth on a body. F= mg

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in the form of chlorophyll

Last year was celebrated as Year of biodiversity.This year is celebrated as International Year of ------------ 2011?You can Ask for answers.................