Final answer:
The hummingbird hovering 30 cm in front of a window will likely see into the room or its own reflection, depending on lighting and window properties.
Step-by-step explanation:
The student asked what a hummingbird would see if it hovers 30 cm in front of a window. While the additional reference information provided does not directly relate to the hummingbird's visual experience, it appears to reference various physics-related contexts involving birds, objects, and distances. However, for this question about the hummingbird and the window, we can infer the answer would involve the subject's perception of its environment, potentially including reflections, light transmission, and the bird's ability to detect motion or presence of potential food sources or predators.
Without additional context, we can speculate that the hummingbird will see into the room behind the window or see its own reflection, depending on the lighting conditions and whether the window is transparent or reflective.