Refraction three beams.jpg
en
Refraction three beams, Three beams of light refracting
commons
en
Refraction three beams, Refraction
commons
ja
屈折 3 つのビーム、光屈折 3 つのビーム
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ja
屈折三線、屈折
commons_translated
refraction refract refractivity refractive refracting telescope refractive index