Question

what r the sign conventions in the lesson ray optics​

Answer 1

Answer:

All the distance are measured from the optical center. The distances measured in the direction of incident rays are positive and all the distances measured in the direction opposite to that of the incident rays are negative......These are some of the main points to remember with that convention: Distances are measured from the lens or mirror. ... Real object or image: distance is positive. Virtual object or image: distance is negative. Convex lens: focal length is positive.......

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Answer 2

Answer:

1)in the direction of the incident ray the sgin convention is positive