An isotope of beryllium (atomic mass of 7.017 u) emits a y ray and recoils with a speed of 1.54 × 104 m/s. Assuming that the isotope is stationary to begin with, find the wavelength of the y ray. Before emission VBe مشر After emission

An isotope of beryllium (atomic mass of 7.017 u) emits a y ray and recoils with a speed of 1.54 × 104 m/s. Assuming that the isotope is stationary to begin with, find the wavelength of the y ray. Before emission VBe مشر After emission

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter27: Quantum Physics

Section: Chapter Questions

Problem 19P

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Concept explainers

Rutherford's scattering experiment

Rutherford’s scattering experiment is also known as the gold foil experiment. This experiment disproved the plum pudding model of J.J. Thomson. In a gold foil experiment, high-energy alpha particles are made to strike a thin gold foil. The scattered alpha particles are detected using a detector. This experiment showed that the positive charge of the atom is at the center. Most of the atom’s mass is also confined to a small volume at the center. This region is known as the nucleus of the atom.

Question

An isotope of beryllium (atomic mass of 7.017 u) emits a y ray and recoils with a speed of 1.54 × 104 m/s. Assuming that the isotope is
stationary to begin with, find the wavelength of the y ray.
min
Before emission
VBe
After emission

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