Understanding, certainty on properties of light (Question 3).
| Q 3. Red light is shining on an object. What color is the shadow behind the object? | |||
|---|---|---|---|
| Response options | Number of responses (%) | Average certainty correct answers (1–5) | Average certainty wrong answers (1–5) |
| ① Red | 31(23.3%) | 3.74 | 2.86 |
| ② Black |
95(73.1%) | ||
| ③ Green | 2(1.5%) | ||
| ④ Purple | 2(1.5%) | ||
*Scientific concept