Final answer:
The standard for a single scoop of custard is a rounded scoop resembling a snowball, which aligns with option B). This question also touches on physics concepts such as light reflection off convex and concave surfaces.
Step-by-step explanation:
You asked, "What constitutes a single scoop of custard?". While this question may seem straightforward, it actually relates to physics and the concept of light reflection. However, if you're looking for the standard serving size of custard, the answer is typically option B) A rounded scoop, resembling a snowball. This is the generally accepted form when serving a scoop of custard or any similar dessert like ice cream. Now, considering the procedure you mentioned with an object, spoon, and reflection: To explore the physics aspect, you can perform a simple experiment. First, choose a small object like a nail or a coin. Then, observe its reflection on the back (convex side) and the front (concave side) of a spoon. When using the back of the spoon, the reflection will appear upright and reduced in size due to the way light rays diverge when they reflect off a convex surface. Conversely, when observing the object's reflection on the bowl side of the spoon at a slight distance, the image will appear larger and inverted, as the concave surface causes light rays to converge, acting like a concave mirror.