4. Consider a HeNe laser with a linewidth of 1.50 GHz and a center wavelength of 632.8 nm. What is the laser linewidth A1 in angstroms? 5. There are a number of ways to express energy in joules or bv, the wavelength 2, the frequency v (in Hz) and the spectroscopic wave number (1a in cm!). Determine appropriate conversion equations for all quantities and complete the following tables. ECV) 4.025 EC 2 (nm) (Hz) 1/2. (cm:1) 4.414x10-19 XeCl Coumarin-2 Argon-ion Tirsapphire Nd YAG 514.5 3.944x10 9398.5