14. X-rays are a commonly used electromagnetic wave in medical imaging technology. Using an X-ray tube to generate X-rays, the shortest wavelength Amin that can be produced is inversely proportional to the voltage V of the tube. This relationship can be expressed by the following equation. = Q/V. What is the value of the constant Q in the equation? Planck constant, an electric charge, and the speed of light are denoted as h, e, and c, respectively. (A) hc (B) e/h (C) e/(hc) (D) hc/e (E) e²/h