来自孟令花的问题
投影仪与银幕相距多少米?幻灯机与银幕相距几米?它们之间的关系是如何?A2M7MB7M2MC15M5MD5M15M
投影仪与银幕相距多少米?幻灯机与银幕相距几米?它们之间的关系是如何?
A2M7M
B7M2M
C15M5M
D5M15M
1回答
2020-04-22 23:52
投影仪与银幕相距多少米?幻灯机与银幕相距几米?它们之间的关系是如何?A2M7MB7M2MC15M5MD5M15M
投影仪与银幕相距多少米?幻灯机与银幕相距几米?它们之间的关系是如何?
A2M7M
B7M2M
C15M5M
D5M15M
个人感觉是选B,你这个应该是教室里用的投影机和幻灯机.专业来讲,投影距离与屏幕的尺寸的关系是:投影距离=屏幕宽度*镜头比.一般投影机标配镜头比为1.5-2.0,所以投影距离7m,画面大概在3.5-4.6左右.幻灯机具体焦距我不...