Answer:
Parallel light rays that enter the lens converge . They come together at a point called the principal focus . In a ray diagram, a convex lens is drawn as a vertical line with outward facing arrows to indicate the shape of the lens .
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Answer:
Parallel light rays that enter the lens converge . They come together at a point called the principal focus . In a ray diagram, a convex lens is drawn as a vertical line with outward facing arrows to indicate the shape of the lens .