ᴅᴇғɪɴᴇ ᴀɴɢʟᴇ ᴏғ ɪɴᴄɪᴅᴇɴᴄᴇ....
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the angle which an incident line or ray makes with a perpendicular to the surface at the point of incidence.
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6
Answer:
the angle which an incident line or ray makes with a perpendicular to the surface at the point of incidence.
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