when you seemingly could focus on all 3 in low power?
thanks for the help
2007-09-07 05:02:34 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Biology
It's called "depth of field". It's a property of optics systems. The threads are apparently at slightly different heights. Just like you can't focus on a book in front of you and a distant object, a high power setting has low depth of field and cannot focus on all three simultaneously.
2007-09-07 05:14:46 · answer #1 · answered by supastremph 6 · 0⤊ 0⤋
As the previous poster said, it is the depth of field. Under low power, the trhee threads are not far enough apart. But when you switch to the higher power, which requires more resolution, the three threads are far enough apart so that you can only focus on one.
2007-09-10 17:51:24 · answer #2 · answered by alynnemgb 5 · 1⤊ 0⤋
Transitioning to the next power requires higher resolution which requires refocusing.
2007-09-07 12:11:23 · answer #3 · answered by Lee S 6 · 0⤊ 1⤋