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The teacher is demonstrating the experiment of the focal length of a convex lens using the u-v…
The teacher is demonstrating the experiment of the focal length of a convex lens using the u-v method. After the teacher takes readings P and Q, he/she assigns two students (Student 1 and Student 2) to take the subsequent readings, assuming that the teacher is right.
(a)
What is the focal length of the given lens?
(b)
How should Student 2 adjust the screen to obtain an accurate reading?
(c)
What error do you observe in the readings of Student 1?
Answer
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From ISC 2025 Practice Physics, question 75.