Who experimented with cathode rays and the different energies they emit?

Who experimented with cathode rays and the different energies they emit?

• A. Phillip Lenard
• B. William Crooks
• C. William Goodspeed
• D. William Conrad Roentgen

Answer: (C)

The question is about who first explored how cathode rays can have different energies depending on the conditions in the tube. Cathode rays are streams of electrons, and their energy is governed by the accelerating voltage applied across the tube. The researcher who specifically studied how changing that voltage changes the energy of the cathode rays and their behavior is William Goodspeed. His work helped establish that cathode-ray energy increases with higher accelerating voltage, affecting how the rays interact with materials and penetrate. Others contributed important foundational observations: Crookes showed basic properties of cathode rays, like their fluorescence and deflection; Lenard investigated how cathode rays behaved under electric and magnetic fields and interacted with materials; Roentgen discovered X-rays, a phenomenon arising from high-energy interactions in the tube but not the direct study of cathode-ray energies themselves.

The question is about who first explored how cathode rays can have different energies depending on the conditions in the tube. Cathode rays are streams of electrons, and their energy is governed by the accelerating voltage applied across the tube. The researcher who specifically studied how changing that voltage changes the energy of the cathode rays and their behavior is William Goodspeed. His work helped establish that cathode-ray energy increases with higher accelerating voltage, affecting how the rays interact with materials and penetrate.

Others contributed important foundational observations: Crookes showed basic properties of cathode rays, like their fluorescence and deflection; Lenard investigated how cathode rays behaved under electric and magnetic fields and interacted with materials; Roentgen discovered X-rays, a phenomenon arising from high-energy interactions in the tube but not the direct study of cathode-ray energies themselves.