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Q.

The sun’s angular diameter is measured to be 1920''. The distance D of the sun from the earth is 1.496×1011m, the diameter of the sun is

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a

9.31×103m

b

1.39×109m

c

3.26×106m

d

8.32×104m

answer is B.

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Detailed Solution

Sun’s angular diameter α=1920''

=1920×4.85×10−6  rad

=9.31×10−3  rad

Sun’s diameter, d=αD

=(9.31×10−3)×(1.496×1011)

1.39×109  m

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