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"Sun-Tanning" in Glass Envelopes Is Caused by

Question 68

Multiple Choice

"Sun-tanning" in glass envelopes is caused by


A) the color the tube gets as it loses its resistance to heat over time
B) oil leaking out of the protective housing
C) the breaking of the glass envelope into small pieces of glass
D) the vaporized tungsten from filament deposits that coats the inside of the glass

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