Question: how to measure the focal length of a parabolic mirror?
Answer: To find the focal point of a parabola, follow these steps: Step 1: Measure the longest diameter (width) of the parabola at its rim. Step 2: Divide the diameter by two to determine the radius (x) and square the result (x ). Step 3: Measure the depth of the parabola (a) at its vertex and multiply it by 4 (4a).