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在阅读近期的美国刊物《THE PHYSICS TEACHER》时,看到两个易使人产生困惑且又极吸引人的实验装置,现将它们介绍给读者,如有条件将它们制作出来并亲手试验一下,则一定更有趣。 1.“迟疑”的沙漏
When reading the recent US publication “THE PHYSICS TEACHER”, I saw two experimental devices that are confusing and intriguing. Now I’ll introduce them to the readers. If conditions permit them to be produced and tested by hand, It must be more interesting. 1.“Hesitate” hourglass