Physics - Kinematics Question with Solution | TestHub

With respect to Queens Lighthouse, Mr. Gibbs uses a technique known as "Doubling the Angle on the Bow." The figure shows the straight track (ABC) of a ship passing by the lighthouse. At point A, Mr. Gibbs measures the angle $\alpha$ between the line of sight to the lighthouse and the ship's direction of motion. At point B, the measured angle becomes $2\alpha$.