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507029
Caption: Double refraction showing two rays emerging when a single light ray strikes a calcite crystal at a right angle to one face
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 31.59 MB
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481082
Caption: Generated by an undersea earthquake, a tsunami may propagate over open ocean waters before cresting and inundating a coastline.
Artist: Encyclopaedia Britannica
Release: Not Applicable
File Size: 34.83 MB