Question

Words:

1. absorb 2. electrons 3. higher 4. lower 5. shorter 6. color 7. excited 8. larger 9. red 10. violet 11. difference 12. ground 13. line 14. released 15. visible

Fill in:

A ___ emission spectrum is seen when light given off by gas discharges tubes passes through the handheld spectroscope. The ____ that are normally in the ___ state ___ the electrical energy and are ___ to a ___ energy level. When these electrons return to a ___ energy level, energy is ___ in the form of ___ light. The ___ of the light is dependent on the ___ between the energy levels; the ___ energy difference or gap, the ___ the wavelength. Small energy gaps result in colors towards the ___ end of the spectrum while larger energy gaps result in colors towards the ___ end of the spectrum.

Answer 1

A Line emission spectrum is seen when light given off by gas discharges tubes passes through the handheld spectroscope. The electrons that are normally in the lower state absorb the electrical energy and are excited to a higher energy level. When these electrons return to a ground energy level, energy is released in the form of visible light. The color of the light is dependent on the difference between the energy levels; the larger energy difference or gap, the shorter the wavelength. Small energy gaps result in colors towards the red end of the spectrum while larger energy gaps result in colors towards the violet end of the spectrum.

NOTE: Energy is inversely proportional to the wavelength. And red light has low energy and long wavelength