Final answer:
The VDT screen orientation must be adjusted based on the geographic latitude to ensure optimal exposure to sunlight. Near the equator, screens lie flat, while at higher latitudes they should be tilted at an angle equal to the latitude. In the context of 3D models, the orientation of elements is critical for correct representation.
Step-by-step explanation:
Orientation of VDT Screens
When setting up a Visual Display Terminal (VDT) screen, it should be oriented based on its geographic location in relation to the sun's position. For those located near the equator, the VDT screens should be positioned flat due to the sun's higher position in the sky. However, for higher northern latitudes where the sun is lower in the southern sky, the VDT screens should be tilted upwards. The ideal tilt angle for maximizing the sunlight exposure is equal to the site's latitude, as depicted in Figure 13.10. This figure exemplifies the concept by showing panels flat on the ground versus being tilted toward the equator and the resulting improvement in solar visibility, particularly at higher latitudes.
In terms of tetrahedral geometry used in graphics or 3D modeling, such as the representations of 2-chlorobutane, one "V" shape should be on the plane of the screen with solid lines, and the perpendicular "V" represented with a solid wedge (bond coming towards the viewer) and a hashed wedge (bond going away from the viewer). The perspective view angle is typically from the top-left corner, where the front "V" appears larger than the rear "V".