Stars in the sky appear to twinkle due to _________?
Correct answer: A. a series of refractions
- A. a series of refractions
- B. a series of reflections
- C. a surface tension phenomenon
- D. multiple diminishing brightness
Explanation
Starlight passes through turbulent layers of Earth’s atmosphere, where repeated refraction changes its apparent direction and brightness. Nearby planets usually twinkle less because their visible discs average out these fluctuations.
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About Physics in Daily Life
Everyday physics explains motion, force, work, power, pressure, heat, light, sound and electricity through familiar devices and natural events. Topics include simple machines, friction, expansion, reflection and refraction, lenses, household circuits, electrical safety and magnetism, with mass distinguished from weight and heat distinguished from temperature.
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