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The Sun's angular diameter is measured t...

The Sun's angular diameter is measured to be 1920". The distance D of the Sun from the Earth is `1.496xx109^(11)` m. What is the diameter of the Sun ?

Text Solution

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Sun.s angular diameter `alpha`
1920"
`=1920xx4.85xx10^(-6)`rad
`9.31xx10^(-3)` rad
Sun.s diameter
`d = alphaD`
`=(9.31xx10^(-3))xx(1.496xx10^(11))`m
`=1.39xx10^(9)m`
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