Explain why the reflection of light off ground glass changes from diffuse to specular if you spill water on it

The reason why this occurs is because water, when spilled on a surface, "beads" in the sense that it is round. This curvature distorts the light in a different way.

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

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