▶ Your Answer :
The reading passgae contends that many possible sources of the ashen light of Venus have been revealed. On the other hand, the lecturer brings up several points that contradict this argument.
First of all, the lecturer points that a chemical process is not responsible for the ahsen light. This is attributed to the fact that this kind of light is so faint that only powerful telescopes can detect. However, the ahsen light is detected by a simple telescope. This refutes the author's point that a chemical process makes the ashen light.
Moreover, in the lecturer, the point is made that the ashen light in not sunlight reflected off coulds. This is because it can be seen very reraly, yet there is sunlight on Venus much more often. This casts doubt on the idea in the reading passage that it is probable that the glow is sunlight reflected off clouds.
The final point made by the lecture is that the it is doubful that the glow is aurorea. It is obvious that the phenomenon needs a magnetic field. In fact, their is no way that aurorea can occur on Venus because Venus does not have one. This is different from the passage's view that the ahen light can be aurorea. |