If the rays move close to the principal axis, the rays can be treated as parallel and are called __________ rays
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Answer: paraxial rays is the correct answer dear....
The rays parallel and close to the principal axis are called paraxial rays. The rays parallel but not close to the principal axis are called peripheral rays.
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paraxial rays
The rays parallel and close to the principal axis are called paraxial rays. The rays parallel but not close to the principal axis are called peripheral rays.
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