A light ray passes from air (\(n{1}=1.00\)) to three layers of the human eye: cornea (\(n{2}=1.33\)), lens (\(n{3}=1.41\)), and vitreous humor (\(n{4}=1.33\)). The speeds of light in these mediums are, respectively, \( u{1}\), \( u{2}\), \( u{3}\), \( u{4}\). Which of the following must be true about the relationships between the speeds of light in the different media?

W) \( u{1}< u{2}< u{3}< u{4}\)

X) \( u{4}< u{3}< u{2}< u{1}\)

Y) \( u{3}< u{2}\) and \( u{4}< u{1}\)

Z) \( u{2}< u{3}\) and \( u{1}< u{4}\)
Y) \( u{3}< u{2}\) AND \( u{4}< u{1}\)