How do you identify the focal point of a Bi-concave
lens? Explain with the help of a ray diagram.
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How do you identify the focal point of a Bi-concave
lens? Explain with the help of a ray diagram.
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Answer:
Light rays entering a converging lens parallel to its axis cross one another at a single point on the opposite side. For a converging lens, the focal point is the point at which converging light rays cross; for a diverging lens, the focal point is the point from which diverging light rays appear to originate.