Planets do not twinkle because A. they emit light of a constant intensity B. their distance...

Planets do not twinkle because

A.	they emit light of a constant intensity
B.	their distance from the earth does not change with time
C.	they are very far away from the earth resulting in decrease in intensity of light
D.	they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable

Expert Solution

D. they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable

Further explanation,
The planets in our solar system, much smaller than stars, are closer and can be resolved as disks with a little bit of magnification (field binoculars, for example). Since the Earth's atmosphere is turbulent, all images viewed up through it tend to "swim." The result of this is that sometimes a single point in object space gets mapped to two or more points in image space, and also sometimes a single point in object space does not get mapped into any point in image space. When a star's single point in object space fails to map to at least one point in image space, the star seems to disappear temporarily. This does not mean the star's light is lost for that moment. It just means that it didn't get to your eye, it went somewhere else.

genius_generous answered 3 months ago

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