What is Vacuum Tube ?

Child's Law, often also called the Child-Langmuir Law was first proposed in 1911 and it forms a key elements within thermionic valve or vacuum tube theory and how a vacuum tube works.

Child derived this equation applicable to vacuum tube theory in 1911 for the case of atomic ions.

These have much smaller ratios of their charge to their mass

Irving Langmuir extended the basic law when he published the application to electron currents in 1913.

This extended it to the case of cylindrical cathodes and anodes.

It is for this reason that the law is sometimes referred to as the Child-Langmuir Law.

What is the purpose of a vacuum tube?

What did the vacuum tube do?

Why are transistors better than vacuum tubes?

Are vacuum tubes still manufactured?

What is the difference between vacuum tube and transistor?

What is anode in a vacuum tube?

What replaced the vacuum tube?

How many vacuum tubes were used in first electronic computer?

How does a vacuum valve work?

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Who invented vacuum tube?

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What invention replaced the solid state transistor?

What invention replaced the solid state transistor?

When did Transistors replace vacuum tubes?

When did Transistors replace vacuum tubes?

Why does thermionic emission take place from a metal surface only?

Why are vacuum tubes used in computers?

When was the vacuum tube invented?