Why do we observe twinkling of stars? – McqOptions

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1.	Why do we observe twinkling of stars?
A.	rise and fall of gaseous ball of fire inside the stars
B.	frequent and periodic fluctuations of temperature of the surface
C.	Constant change of refractive index of the medium between the stars and the Earth because of temperature variation
D.	great distance of stars from the Earth
Answer» D. great distance of stars from the Earth

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