Final answer:
While the question appears to concern mathematical congruence in architecture, the extra context provided actually deals with physics concepts such as diffraction, reflection, and the nature of virtual and real images. It discusses phenomena such as fuzzy shadows due to diffraction, the visibility and photographability of virtual images, and image distances in relation to mirrors according to the law of reflection.
Step-by-step explanation:
The question concerns the concept of congruence in the context of apartment buildings and whether Building B can be considered congruent to Building A because it is a reflection, dilation, or has undergone the same transformation.
However, the additional information provided points towards a different subject altogether, namely physics, and discusses the phenomena of diffraction, reflection, and the properties of real and virtual images.
The concept of congruence is a mathematical one, typically encountered within geometry, but when considering the additional context provided with shadows and waves, this extends into the realm of physics. Therefore, the original question about apartment buildings does not align with the examples given, making it difficult to properly address.
To clarify the physics concepts, diffraction is a phenomenon which occurs when a wavefront encounters an obstacle, such as a building, causing the waves to bend around the edges and create a fuzzy shadow.
This is correctly identified as the answer to question 16. Moreover, virtual images, such as those formed by a plane mirror, can indeed be seen and photographed, as they are representations created by the light rays perceived by the eye or camera.
Question 16.1 deals with the properties of these virtual images and their reflection within mirrors. Lastly, when discussing image distances in relation to plane mirrors, the object distance and image distance have opposite signs because they are measured in opposite directions from the mirror, according to the law of reflection.