A particular star appears brighter seen through a blue filter than seen through a yellow filter.Which surface temperature is possible for this star? (See Figure 10-4,Comins,Discovering the Essential Universe,6th ed.)

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Quizplus · Accepted Answer

This is because hotter stars emit more blue light (shorter wavelengths) compared to cooler stars which emit more red light (longer wavelengths). Therefore a star appearing brighter through a blue filter than through a yellow filter indicates that it emits more blue light, which is characteristic of hotter stars.

A Particular Star Appears Brighter Seen Through a Blue Filter