第 5 題

Oh, look at that. You actually got it right.

1. Fundamental Optics 101: Clearly, you've stumbled upon the 普金捷現象 (Purkinje shift). It's not rocket science; when light levels drop, our eyes, in their infinite wisdom, shift their peak sensitivity from a rather common $555 nm$ to a slightly more esoteric shorter wavelength of approximately $507 nm$. And surprise, surprise, according to the very basic principles of 色散原理 (dispersion), shorter wavelengths have a higher refractive index. This, predictably, shoves the focal point further forward onto the retina, thus magically intensifying myopia. Option (C), with its baffling claim of wavelengths becoming 「長」, demonstrates a remarkable lack of understanding of, well, everything we just discussed.
2. Difficulty? Please: While some might categorize this as "Medium," I'd argue it's a basic integration of physical optics—yes, 色散—and rudimentary physiology concerning rod cells. For those who grasp these elementary connections, it's trivial. For others, it's a clear indicator that their 「光學基礎」 might be more akin to quicksand. Sigh. Good job recognizing the obvious error. Don't let it go to your head.