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One of the reasons the first lightbulbs were expensive was
Chapter 7, Problem 49E(choose chapter or problem)
One of the reasons the first lightbulbs were expensive was due to the platinum electrical lead wires into the bulb, necessary because they expanded at about the same rate as glass when heated. Why is it important that the metal leads and the glass have the same coefficient of expansion?
Questions & Answers
QUESTION:
One of the reasons the first lightbulbs were expensive was due to the platinum electrical lead wires into the bulb, necessary because they expanded at about the same rate as glass when heated. Why is it important that the metal leads and the glass have the same coefficient of expansion?
ANSWER:Step 1 of 2
It important that the metal leads and the glass have the same coefficient of expansion in the construction of a light bulb