Understanding, certainty on properties of light (Question 1).
| Q 1. How far does the light reach when the curtain is opened? | |||
|---|---|---|---|
| Response options | Number of responses (%) | Average certainty correct answers (1–5) | Average certainty wrong answers (1–5) |
| ① To the wall opposite the curtain opening | 66(50.8%) | 3.55 | 3.44 |
| ② Only near the open curtain | 53(40.4%) | ||
| ③ Entire room |
11(8.5%) | ||
*Scientific concept