如圖所示,用刻度尺測量物體的長度,讀數(shù)時視線正確的是 ?。ㄟx填“A”或“B”),測出該物體的長度是 cm.
玻璃板厚度/mm |
2 |
2 |
2 |
5 |
5 |
5 |
物距/cm |
2.6 |
5.5 |
8.3 |
2.6 |
5.5 |
8.3 |
像距/cm |
2.8 |
5.6 |
8.5 |
3.0 |
5.8 |
8.7 |
像距與物距的差值/cm |
0.2 |
0.1 |
0.2 |
0.4 |
0.3 |
0.4 |