Which of the following produces light due to heated tungsten wire?

Which of the following produces light due to heated tungsten wire?

• A. A fluorescent bulb
• B. A sodium vapor bulb
• C. An incandescent bulb
• D. A glowstick

Answer: (C)

The incandescent bulb produces light by heating a tungsten filament until it glows. This process is known as incandescence, where the filament gets extremely hot and emits visible light. The design of an incandescent bulb includes a tungsten wire that can withstand high temperatures without melting. When an electric current passes through the wire, the resistance causes it to heat up to the point of glowing brightly, thus producing light. Other options, such as fluorescent bulbs and sodium vapor bulbs, generate light through different mechanisms. Fluorescent bulbs use a gas and phosphor coating, while sodium vapor bulbs create light by passing an electric current through sodium vapor. Glowsticks rely on a chemical reaction to produce light, which is a completely different process. Therefore, the incandescent bulb is the only option that directly produces light through the heating of tungsten wire.

The incandescent bulb produces light by heating a tungsten filament until it glows. This process is known as incandescence, where the filament gets extremely hot and emits visible light. The design of an incandescent bulb includes a tungsten wire that can withstand high temperatures without melting. When an electric current passes through the wire, the resistance causes it to heat up to the point of glowing brightly, thus producing light.

Other options, such as fluorescent bulbs and sodium vapor bulbs, generate light through different mechanisms. Fluorescent bulbs use a gas and phosphor coating, while sodium vapor bulbs create light by passing an electric current through sodium vapor. Glowsticks rely on a chemical reaction to produce light, which is a completely different process. Therefore, the incandescent bulb is the only option that directly produces light through the heating of tungsten wire.