Question

neon lights are filled with neon gas, which is then excited by ____________ and only then does it becomes colorful. mixing neon with another type of gas high voltage electricity sunlight being absorbed

Explanation:

Neon lights operate based on the principle of gas discharge. When high - voltage electricity is applied to the neon gas inside the tube, the gas atoms get excited. Excited atoms release energy in the form of light. Mixing neon with another gas would change the color but is not the excitation mechanism. Sunlight absorption is not relevant to the operation of neon lights as they are artificial light sources that work independently of sunlight.

Answer:

high voltage electricity