35. Special Relativity
Inertial Reference Frames
35. Special Relativity Inertial Reference Frames
149PRACTICE PROBLEM
Ionized helium gas (He+) interacts with a stream of fast-moving electrons. Determine the least speed of electrons that cause emission at λ = 470 nm due to the transition from the 4th to 3rd energy levels in He+ ions. Assume He+ ions do not gain additional electrons in the process.
Ionized helium gas (He+) interacts with a stream of fast-moving electrons. Determine the least speed of electrons that cause emission at λ = 470 nm due to the transition from the 4th to 3rd energy levels in He+ ions. Assume He+ ions do not gain additional electrons in the process.