What are some reasons why no practical fusion reactor has yet been developed?

Lecture/Book Notes: Chapter 3.5-3.10 CHEM 1030 Cagg Highlighted: Vocab ----- Highlighted: Formula Section 3.5 v The de Broglie Hypothesis • De Broglie claimed that an electron in an atom behaves like a standing wave, and if it does so in a hydrogen atom, the wavelength should fit the circumference of the orbit exactly. • To show the relationship between circumference if an allowed orbit and the wavelength of the electron, use this formula: 2πr = nλ - “r” is the radius of the orbit - “λ" is the wavelength of the electron