3. Consider two stars. Star A has a surface temperature of 12000 K. Star B has a surface temperature of 6000 K. The diameter of star A is twice of the diameter of star B. The two stars have the same apparent magnitude. Answer the following questions about star A and star B. There is no need to explain (a) Which star is more luminous (i.e. emitting more radiation power)? (b) Which star is brighter in the sky? (c) Which star is at a larger distance (measuring from Earth)?
3. Consider two stars. Star A has a surface temperature of 12000 K. Star B has a surface temperature of 6000 K. The diameter of star A is twice of the diameter of star B. The two stars have the same apparent magnitude. Answer the following questions about star A and star B. There is no need to explain (a) Which star is more luminous (i.e. emitting more radiation power)? (b) Which star is brighter in the sky? (c) Which star is at a larger distance (measuring from Earth)?
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