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Here is the question which I am struggling on, please help me!

Question: If you moved too far away from the wall the circle of light probably became very difficult to see.

Part I: Is the intensity of the light circle ever zero?

Part II: Is it correct to say that gravity doesn'tt exist between objects on opposite sides of the galaxy?

Please provide me complete solution for the above question so I can get right solution. Thanks.

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Category:- Physics
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