|
What is the approximate diameter of human hair? |
|||
|
(a) |
500 nm |
(b) |
5000 nm |
|
(c) |
50 nm |
(d) |
50000 nm |
|
What is the approximate diameter of human hair? |
|||
|
(a) |
500 nm |
(b) |
5000 nm |
|
(c) |
50 nm |
(d) |
50000 nm |