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Atomic physics questions

Atomic physics questions | form six Physics

Find Atomic physics examination questions, form six Physics in acaproso.com

#	Question
1	A muon is a particle which has the same charge as ana electron but its mass is 207 times the mass of an electron. An unusual atom similar to hydrogen has been created consisting of a muon orbiting a single proton. An energy level diagram for this atom is shown in Figure 1. Determine the ionization energy of this atom in joules. Calculate the maximum possible wavelength of a proton which absorbed will be able to ionize this atom. Calculate the de Broglie wave length of muon travelling at 11% of the speed of light. Mathematical Calculation
2	Why are the energy levels labelled with negative energies? Short answers
3	Ultraviolet light of wavelength 3600x10^-10m is made to fall on a smooth surface of potassium. Determine: The maximum energy of emitted photoelectrons. The stopping potential. The velocity of the most energetic photoelectrons given that work function for potassium is 2eV. Mathematical Calculation
4	Define activity and half-life. Short answers
5	Give any four uses of LASER light. Short answers
6	The isotope $_{19}^{40} extrm{K}$ with a half-life of 1.37x10⁹ years decays to $_{18}^{40} extrm{Ar}$ , which is stable. Moon rocks from the sea of tranquility show that the ratio of these potassium atoms to argon atoms is $frac{1}{7}$ . Determine the age of the moon rock. Mathematical Calculation
7	The half-life of a radioactive substance is 1 hour . How long will it take for 60% of the substance to decay? Mathematical Calculation
8	what is a nuclear reactor. Short answers
9	Briefly explain any three main components in a nuclear reactor. Short answers
10	Sketch the binding energy curve. Short answers