Question

12. The distance of the sun from the earth is 1.496 x 1011 m. If sun's angular diameter is 9.31 x 10-3 rad as measured from the earth, find the diameter of the sun. ​

Answer 1

Answer:

We know that 1

′′

=(

3600

1

)×

180

π

rad

Angular diameter θ=1920

′′

=1920×

3600×180

π

rad=0.0093 rad

Distance of sun from the earth,$$r=1.496\times 10^{11} $$

Step 2: Calculate diameter of sun

tanθ=

r

D

as θ is very small so tanθ=θ

$$D = \theta \ r = 0.0093×1.496×10

11

m=1.39×10

9

1. m