Who developed the hot cathode ray tube?

What will be an ideal response?


In 1913, William David Coolidge, working for General Electric Company, designed the hot cathode tube in which the tube and high-voltage transformer were placed in an oil-filled compartment that acted as a radiation shield and electrical insulator.

Health Professions

You might also like to view...

Situations that require immediate attention to avoid the loss of life or limb are:

A) critical. B) emergencies. C) urgent. D) terminal.

Health Professions

Normal visual acuity, or clearness of vision, is referred to as 20/20 vision, which means the eye should see an object 20 feet away clearly.

Answer the following statement true (T) or false (F)

Health Professions

Signs and symptoms that are associated routinely with a disease process are coded as an additional diagnosis if they are recorded in the patient's record

a. True b. False Indicate whether the statement is true or false

Health Professions

Mark Atom is a patient at Valley Nursing Home. He was in a motor vehicle accident three years ago with injuries to his head and a fracture of the skull. His current diagnosis is epilepsy as a result of head injury and depression. He is being seen for renewal of his monthly orders. Select the appropriate code(s)

345.1 Generalized convulsive epilepsy 345.10 Generalized convulsive epilepsy, without mention of intractable epilepsy 345.90 Epilepsy, unspecified 803.00 Fracture, skull, unspecified loss of consciousness 311 Depression 905.0 Late effect of skull fracture A) 345.1, 311 B) 345.90, 803.00, 311 C) 345.90, 311, 905.0 D) 345.10, 311, 803.00, 905.0

Health Professions