In the case of harder X-rays,

Step-by-step solution

Hard X-rays are characterized by their high penetrating power, which implies that the individual photons possess higher energy. The energy of an X-ray photon is given by E = h = hc , where is the frequency and is the wavelength. For harder X-rays, the photon energy E is higher. Consequently, the frequency is higher and the wavelength is shorter. The intensity of X-rays depends on the number of photons emitted per second and is independent of the hardness of the X-rays.