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Please implement the solution of the given question

Question 1- An illuminated test object is placed on an optical bench and a screen is placed 60 cm away. A converging lens is placed between the two, and a sharp image is formed on the screen when the lens is 20 cm away from the object.

Part A- What is the focal length of the lens?

Part B- Calculate the angular size in radians, and in degrees, of a dime at a distance of 5 meters.

You need help to illuminate the answer of the above question.

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