As a first year physics student, the Greek alphabet bewilders me. I'm sure everyone here has made the mistake of confusing a nu for a v, and yesterday I found out that I am incapable of writing zeta. However, the worst offender in my book is the letter phi. In the E&M textbook I am using (by Purcell), flux is denoted by [tex]\Phi[/tex], and electric potential is denoted by [tex]\phi[/tex] -- except when it's denoted by [tex]\varphi[/tex]. Worst of all, I can't decide whether it rhymes with "lie" or "lee." A Google search shows that there are a lot of people who pronounce it different ways (see this and this.) My question to you, is how do you pronounce it? Have you noticed different pronunciations in different contexts?