Which of the following is a characteristic vulnerability of CRT displays in radar systems due to their vacuum design?

Which of the following is a characteristic vulnerability of CRT displays in radar systems due to their vacuum design?

• A. Implosions
• B. Fragile glass that can crack externally
• C. Susceptibility to electromagnetic interference
• D. Radiation leakage

Answer: (A)

Vacuum inside CRT displays creates a risk of implosion if the glass envelope is compromised. Because the tube is evacuated, outside atmospheric pressure pushes on the thin glass. If the envelope is damaged or cracked, that inward pressure can cause a violent collapse—an implosion that can eject shards outward. This vulnerability is a direct result of the vacuum design and is why protective measures like shrouds or cages are used around radar CRTs. Other issues mentioned aren’t tied to the vacuum itself: electromagnetic interference isn’t caused by the vacuum, and radiation leakage is addressed with shielding rather than the vacuum condition.

Vacuum inside CRT displays creates a risk of implosion if the glass envelope is compromised. Because the tube is evacuated, outside atmospheric pressure pushes on the thin glass. If the envelope is damaged or cracked, that inward pressure can cause a violent collapse—an implosion that can eject shards outward. This vulnerability is a direct result of the vacuum design and is why protective measures like shrouds or cages are used around radar CRTs. Other issues mentioned aren’t tied to the vacuum itself: electromagnetic interference isn’t caused by the vacuum, and radiation leakage is addressed with shielding rather than the vacuum condition.