A device for producing high-velocity nuclei is ________________?
Correct answer: B. Linear accelerator
- A. Cloud chamber
- B. Linear accelerator
- C. A mass spectrograph
- D. Wilson cloud chamber
Explanation
A linear accelerator uses electric fields to accelerate charged nuclei or other particles to very high speeds. A cloud chamber only detects particle tracks, while a mass spectrograph separates ions according to their mass-to-charge ratio rather than primarily producing high-velocity nuclei.
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About Quantum Theory and Radiation
Quantum theory treats electromagnetic radiation as packets of energy called photons, with energy proportional to frequency through E equals hf. The topic covers Planck's hypothesis, photon momentum, the photoelectric effect, threshold frequency, work function and wave particle duality, distinguishing quantised energy exchange from classical continuous radiation.
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