A far off planet is estimated top be at a distance D from the earth - if its diametrically opposite extremes subtend an angle of 10 at an observatory situated on the earth - the apparx diameter of the planet is

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Byju's Answer

Standard XII

Physics

Kepler's Law

A far off pla...

Question

A far off planet is estimated top be at a distance D from the earth . if its diametrically opposite extremes subtend an angle of ⚾ at an observatory situated on the earth , the apparx diameter of the planet is

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Solution

Let the daimeter be x
We can use parallax method
l = r θ
x = Dθ

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