Q1. Suppose that in franck-hertz experiment, electron of energy 12.5 ev is used to excite hydrogen atoms. What is the maximum amount of energy the incident electron can lose in elastically in this collision? What is left over energy of the electron?
Q2. Juan's parents, aunts and uncles smoke cigarettes, however they advise him not to smoke. Julia's parents and friends don't smoke, although they say nothing to discourage her from doing so. According to the observational learning theory, will Juan or Julia be more likely to start smoking? Give details in answer.
Q3. A crude, symmetric handheld microscope consists of two converging 20 D lenses fastened in the ends of a tube 27 cm long. What is the "tube length" (distance between the foci of the two lenses) of the microscope?