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1.Explain the statement that "One's eyes could not detect faint starlight if light wee not particle- like"????2.Any series of atomic hydrogen yet to be observed will probably be found in what region of the spectrum??????3.Explain why the gases must be at a low pressure to obtain a discharge in a Discharge tube????4.A neutron collide head on with a stationary hyydrogen atom in ground state,then(any one is correct) a. If kinetic energy of the neutron is less than 13.6eV, collision must be elastic. b If kinetic energy of the neutron is less than 13.6eV, collision may be inelastic. c inelastic collision takes place when initial kinetic energy of neutron is greater than 13.6eV. d perfectly inelastic collision cannot take place. 5.In an decay the kinetic energy of a particle is 48 MeV & the Q-value of the reaction is 50MeV. The mass number of the mother nucleus is:(Assume daughter nucleus is in ground state) a. 96 b. 100 c. 104 d. none of these.6.The decay constant of the end product of a radioactive series is a.zero b.infinite c.finite(non zero) d.depends on the end product .
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