影子的形成因素有哪些？

形成因素等價于影子的產生條件

最簡單就是光沿著直線傳播這一初中物理知識

形成條件有三

1.能夠遮擋住光的物體（不能是透明的）

2.能夠投射出影子的地方

3.當然是光咯

三個條件缺一不可，完全具備三個基本條件才會產生影子哦。留下一個參考視頻的鏈接https://m.baidu.com/sf?pd=video_page&nid=327550947982360421&sign=5915128401980833697&word=%E5%BD%B1%E5%AD%90%E5%BD%A2%E6%88%90%E7%9A%84%E6%9D%A1%E4%BB%B6%E6%98%AF%E4%BB%80%E4%B9%88&oword=%E5%BD%B1%E5%AD%90%E5%BD%A2%E6%88%90%E7%9A%84%E6%9D%A1%E4%BB%B6%E6%98%AF%E4%BB%80%E4%B9%88&title=%E5%BD%B1%E5%AD%90%E7%9A%84%E5%BD%A2%E6%88%90%E6%9D%A1%E4%BB%B6&atn=index&alr=1&openapi=1&resource_id=5052&frsrcid=4185&frsrcid=4185&cambrian_id=1612732424718028&sp=0&ext=%7B%22src%22%3A%22https%3A%5C%2F%5C%2Fvdse.bdstatic.com%5C%2F%5C%2Fe04e64c5aa5d1fe9db0f5117af927479.mp4%3Fauthorization%3Dbce-auth-v1%252F40f207e648424f47b2e3dfbb1014b1a5%252F2020-03-27T18%253A25%253A04Z%252F-1%252Fhost%252F2264c3133a41c9757a824d98f69d5d8d8dac1aed636d91369d94e352f06a39cd%22%2C%22loc%22%3A%22http%3A%5C%2F%5C%2Fv.qq.com%5C%2Fx%5C%2Fpage%5C%2Fi08280twzc7.html%22%2C%22log_loc%22%3A%22http%3A%5C%2F%5C%2Fv.qq.com%5C%2Fx%5C%2Fpage%5C%2Fi08280twzc7.html%22%2C%22duration%22%3A%2224%22%2C%22poster%22%3A%22http%253A%252F%252Fvdposter