Question

The angular diameter of the sun is 1920’’. If the distance of the sun from the earth is 1.5×10^11 m, what is the linear diameter of the sun?

(a) 4.85×10^-6 m

(b) 1.4×10^9m

(c) 2.35×10^8 m

(d) 1.4×10^8m

I had been asked this question in a job interview.

My enquiry is from Units and Measurements topic in chapter Advanced Engineering Materials of Engineering Physics II

Answer 1

The correct option is (b) 1.4×10^9m

To explain I would say: Distance of the sun from the earth = 1.5×10^11m

Angular diameter of the sun = 1920×4.85×10^-6 rad

Linear diameter of the sun = 1.5×10^11×1920×4.85×10^-6 = 1.4×10^9 m.