Definition of total internal reflection in English:

total internal reflection

Line breaks: total in|tern¦al re|flec¦tion

Entry from British & World English dictionary

noun

[mass noun] Physics
The complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle.

Definition of total internal reflection in:

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Word of the day setose
Pronunciation: ˈsiːtəʊs
adjective
bearing bristles or setae; bristly