Video 4
Name: Newton’s ring experiment
Introduction: radius is an important physics quantity of convex lens, which determines other physical parameters of the lens, such as focal length, etc., and requires accurate measurement. Because directmeasurement is very difficult, a simple and indirect measurement method isdescribed in this experiment, which is based on Newton ring, migrationmicroscope and interference pattern. In this method, the diameter of theinterference ring is measured, and then the formula is used to calculate.Through the average value of many times, the result is more reliable. Thedifficulty of the experiment is moderate, which is suitable for the study andpractice of foreign students.