In the double-slit experiment with photons, the phenomenon you described does not occur. Unlike sound waves, which are mechanical waves and require a medium to propagate, photons are particles of light that exhibit wave-particle duality. In this experiment, individual photons behave as waves and can interfere with each other.
When a beam of light, composed of individual photons, passes through a double-slit, it creates an interference pattern on a screen or detector placed behind the slits. This pattern arises from the constructive and destructive interference of the photon waves.
In the case of photons, there is no dissipation of energy or loss of intensity due to the presence of the slits or any obstruction. The photons that are blocked by the material of the slits do not lose energy. Instead, they may be absorbed or scattered by the material, but the energy of the photons is conserved.
The interference pattern observed on the screen in the double-slit experiment with photons demonstrates the wave-like behavior of light and does not involve energy loss. The pattern arises from the superposition and subsequent interference of the photon waves passing through the two slits.