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Richardson in 1928
Richardson in 1928
Richardson's grave in Brookwood Cemetery
Richardson's grave in Brookwood Cemetery
Title page to The emission of electricity from hot bodies (1916)
Title page to The emission of electricity from hot bodies (1916)
Preface to The emission of electricity from hot bodies (1916)
Preface to The emission of electricity from hot bodies (1916)
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Closeup of the filament in a low pressure mercury gas-discharge lamp showing white thermionic emission mix coating on the central portion of the coil.
Closeup of the filament in a low pressure mercury gas-discharge lamp showing white thermionic emission mix coating on the central portion of the coil. Typically made of a mixture of barium, strontium and calcium oxides, the coating is sputtered away through normal use, eventually resulting in lamp failure.
One of the bulbs with which Edison discovered thermionic emission. It consists of an evacuated glass light bulb containing a carbon filament (hairpin
One of the bulbs with which Edison discovered thermionic emission. It consists of an evacuated glass light bulb containing a carbon filament (hairpin shape), with an additional metal plate attached to wires emerging from the base. Electrons released by the filament were attracted to the plate when it had a positive voltage.
Schottky-emitter electron source of an electron microscope
Schottky-emitter electron source of an electron microscope