Star a has an apparent magnitude of ‒1.5 and is 12.7 light years from earth. star b has an apparent magnitude of 0.4 and is 15.6 light years from earth. explain why apparent magnitude should not be used to determine which star is brighter. identify the additional information you would need in order to determine which star should be described as the brighter star.
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The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?
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Star a has an apparent magnitude of ‒1.5 and is 12.7 light years from earth. star b has an apparent...
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