Light bends when it passes through air.
Meaning: This means that the path of light is altered as it moves through the air, which can affect the way we perceive objects.
Choice of Words: Light is a form of energy that travels in waves and can be visible or invisible. Bends means to curve or change direction. When is a conjunction used to indicate the time or occasion of something. Air is the invisible gaseous substance that surrounds the earth. When you put them together, "Light bends when it passes through air" expresses the phenomenon of light changing direction as it travels through the atmosphere.
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