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Twinkling of stars is related to the phenomenon of ________.
interference of light
reflection of light
refraction of light
dispersion of light
refraction of light
The twinkling of stars is primarily due to the atmospheric refraction of starlight. As starlight travels through the Earth's varying layers of the atmosphere, it undergoes continuous and random refraction due to changing density and temperature, causing the apparent position and brightness of the star to fluctuate rapidly.
The twinkling of stars is primarily due to the atmospheric refraction of starlight. As starlight travels through the Earth's varying layers of the atmosphere, it undergoes continuous and random refraction due to changing density and temperature, causing the apparent position and brightness of the star to fluctuate rapidly.
Looking at the bottom of a swimming pool with rippling water makes objects at the bottom appear wavy and shimmering, similar to how starlight shimmers when viewed through the moving layers of Earth's atmosphere.
STAR: Straying Through Atmospheric Refraction
n=vcтАЛ тАФ Refractive index of a medium
╬┤тЙИdxd╬╝тАЛ тАФ Approximate angular deviation due to refractive index gradient
Light from distant stars is essentially a point source. When this light enters the Earth's atmosphere, it passes through layers of air with differing refractive indices that fluctuate constantly due to wind, temperature, and convection currents. Consequently, the light rays bend randomly, making the star appear to twinkle (scintillation) when viewed from the Earth's surface.
Stars twinkle because they act as point sources of light located very far away.
Planets do not twinkle because they are much closer and behave as extended sources (collections of numerous point sources whose variations average out to zero).
Refractive index of atmospheric layers changes constantly due to temperature variations and wind currents.
Explains why stars twinkle at night while planets shine with a steady light.
Accounts for advanced sunrise and delayed sunset phenomena.
Accounts for the apparent shifting of the sun's position at the horizon.
Refraction occurs whenever light passes obliquely from one transparent medium into another with a different optical density.
Option A (interference of light) is responsible for soap bubble colors and oil film fringes.
Option B (reflection of light) is responsible for image formation in mirrors.
Option D (dispersion of light) is responsible for rainbow formation through prisms.
C is correct тАФ Twinkling of stars is related to the phenomenon of refraction of light.
Remember that planets do not twinkle because their extended disk size averages out individual light fluctuations, unlike point-like stars.
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