Give the two controlled variables for: what is the relationship between the angle of incidence and the area illuminated by the sun Answer question

The two controlled variables in the experiment to determine the relationship between the angle of incidence and the area illuminated by the sun could be:

1. Intensity of Light: The intensity of the sunlight should remain constant throughout the experiment. This is because a change in intensity could affect the area illuminated, which could skew the results of the experiment.

2. Distance from the Light Source: The distance from the sun (or any light source used to simulate the sun) to the surface being illuminated should also remain constant. This is because a change in distance could also affect the area illuminated.

These variables need to be controlled to ensure that any changes observed in the area illuminated can be attributed to changes in the angle of incidence, and not to other factors.