Since the rotation period of the sun can be determined by observing the apparent motions of sunspots, a correction must be made for the orbital motion of earth. explain what the correction is and how it arises. making some sketches may answer this question.

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Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.