ablating material

ablating material

[ə′blād·iŋ mə‚tir·ē·əl]
(materials)
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Such a pattern is produced when light rays reflecting from the top of the ablating material interfere with light rays reflecting from the solid material that remains intact beneath the cloud, which is rapidly expanding upward.
The observations suggest that the ablating material is in a transparent state with a distinct front that typically moves upward at a few hundred meters per second.