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.