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An imaginary line perpendicular to a reflecting surface is called ____refrac_____. a. a mirror b. a normal c. an incident d. a refracting surface
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An imaginary line perpendicular to a reflecting surface is called ____refrac_____.

a. a mirror
b. a normal
c. an incident
d. a refracting surface

User Karthik Kompelli
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not totally sure but i would say a normal? its not refraction or incidence if its perpendicular and i dont think its a mirror if its an imaginary line so yeah normal (normals are always perpendicular to their surface too i think so)
User Fazeleh
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