Question: Suppose the liquid in the image is divided equally into two portions and filtered using two different devices. Device A uses ordinary filter paper with a pore size of 10 micrometers (μm), while Device B uses a semipermeable membrane with a pore size of 5 nanometers (nm). Regarding the two resulting filtrates, which statement is correct?
A. The filtrate from Device A is clear and transparent, while the filtrate from Device B still shows a visible light-beam path.
B. With both devices, the filtrates no longer show a clear light-beam path.
C. The filtrate from Device A still shows a visible light-beam path, whereas the filtrate from Device B does not.
D. Regardless of which device is used, the freezing point of the filtrate will be significantly higher than that of the liquid before filtration.
Clues:
1. The image shows a bright blue sky.
2. There are white clouds visible in the sky.
3. The scene is outdoors during the daytime, illuminated by the sun.
4. A sundial is in the foreground, which relies on sunlight passing through the atmosphere to function.
Answer: C
Category: Physics