Gas Discharge Tube: Unleashing Vibrant Colors!
Why does a gas discharge tube (e.g., a neon light) have a certain color?
A. The tungsten filament in the tube glows.
B. The discharge tube is surrounded by a filter.
C. The gas radiates a continuous spectrum of colors.
D. The gas radiates only a few discrete wavelengths.
E. None of the above
Answer:
A gas discharge tube, such as a neon light, emits a certain color because the gas inside the tube radiates a few discrete wavelengths of light. The specific color depends on the type of gas in the tube. The correct option is D.
Have you ever wondered why gas discharge tubes like neon lights shine in vibrant colors? The magic lies in the unique behavior of gas atoms when stimulated by electricity. When an electrical current passes through the gas inside the tube, the atoms within the gas get excited and start emitting light energy.
The color emitted by the gas discharge tube is determined by the specific gas present inside the tube. For example, neon gas emits a striking fiery red glow, while argon gas emits a mesmerizing lavender hue. This phenomenon occurs because the gas atoms radiate only a few discrete wavelengths of light, resulting in the distinct colors we see.
So, if you chose option D - "The gas radiates only a few discrete wavelengths" - as the correct answer, give yourself a pat on the back! You've grasped the fascinating science behind the colorful display of gas discharge tubes.