Assertion: led's light | /r/HasProperty | deflected by refraction
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text: The reason for this is that whilst a beam of light (a photon) approaching the chip wall at an angle perpendicular to the surface, passes easily from the chip into the surrounding medium (e.g. the transparent plastic of the LED body), light approaching the chip surface at other angles is deflected by refraction as it meets interface between the chip and the surrounding material.