I WONDER - What Is An Incandescent Lightbulb?

Incandescent light bulbs are the oldest type of light bulb, using a tungsten filament to produce light. They are inexpensive to manufacture but are not energy-efficient and have a short lifespan.

What is the historical significance of incandescent light bulbs?

• They are the most expensive type of bulb.

• They are the most energy-efficient type of bulb.

• They were the first type of light bulb invented.

• They are the longest-lasting type of bulb.

What material is the filament in an incandescent bulb made of?

• Tungsten

• Aluminum

• Iron

• Copper

How does the filament in an incandescent bulb produce light?

• By emitting LED light

• By using chemical reactions

• By glowing when heated by an electric current

• By reflecting sunlight

What is a major disadvantage of incandescent bulbs?

• They are very expensive to produce.

• They have a short lifespan.

• They are difficult to install.

• They are not available in stores.

Why are incandescent bulbs considered not energy efficient?

• They consume a lot of electricity for the light they produce.

• They require special fixtures.

• They need frequent maintenance.

• They are only available in low wattages.