Close Window    Spectrum Tubes 20 cm tubes 5 cm capillary in middle filled with spectrocopically pure gases working on 5 cm spark induction coil or 4.5 KV high voltage transformer. A) Oxygen        (B) Hydrogen           (C) Neon              (D) Carbon. E) Helium        (F) Krypton               (G) Methane        (H)Mercury. I) Argon            (J) Water vapour      (K) Air                   (L) Nitrogen.
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