Determining the focal length of convex lens|HAPPY Learning

This video is about experimental method to determine the focal length of a convex lens by
1) distant object method
2) u-v method
This video describes the arrangements and the experimental procedure step by step.
Here a paper box with arrow mark cutting is used as the object. It is illuminated using the LED torch light of a mobile phone. One can use regular LED torch or a LED bulb or a candle to illuminate the object.

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