Light : A Unique Substance

Light is Special to us because it is very source of Measuring Instrument to Observe Universe. Speed of Light is the fastest possible way any information can travel in this whole cosmos this also puts a limiting condition on concept of Causality which is our reality how we observer universe.So We have told about A Unique Substance LIGHT; The most  important substance to see other objects. Light is nothing but a lot of energy . You know how possible I can see other objects with light.Why stars blink and planets aren’t. Why do the moon & planets reflect? What is the colour of the sun Yellow or White. Why does the moon shadow? Why I can’t see stars clearly. I can see stars who have died or not at the same point? Why pole stars are exact points(North From Earth). What is Spectrum? Why made the Rainbow follow Spectrum? Why do lights bend? Why lights have the fastest speed. What is the light year comparison with earth’s year. What light has extraordinary power?  All Question about light in your mind                We have told all question’s answers. Before read the Book please observe the stars In sky and collect information for basics knowledge