NCERT Exercise 9.1 — Q4 - Light — Reflection and Refraction
Question: A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be
Answer: The correct answer is option (a), which states that both the spherical mirror and the spherical lens are concave. Under the New Cartesian Sign Convention, the signs of focal lengths are determined ...
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