Alamak you fail your primary school science is it? sign....... better go check with your fat buddy with many years of reefing experience lah.
Diffused light source will cast the same shadow in the two different photos taken at different time. This is true even if the camera is placed on different location.
As for the reflection, those are clearly wires/cables on the hood of the tank, not surprising that they are visible.
oh BH, photoshop expert huh