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A student is performing an experiment to determine focal length of a convex lens by using an…
A student is performing an experiment to determine focal length of a convex lens by using an optical bench. State whether the student's response is correct or incorrect. Give a reason for your answer in each case:
(i)
EXAMINER: Image formed by the lens is magnified. Reduce the size of the image.
STUDENT moves the lens towards the object pin.
(ii)
EXAMINER: Plot a graph of (1/v) against (1/u).
STUDENT takes (1/v) on Y axis and (1/u) on X axis.
(iii)
EXAMINER: Write the relation between the optical power (P) and the focal length (f) of the convex lens.
STUDENT writes P = 2f.
Answer
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From ISC 2024 Physics Paper 1, question 15.