医学物理历年试题2003试卷.doc

Medical College of Shantou University The Test Paper of Medical Physics for 2003 students under 7-year teaching system (A) Names:___________; Registration No:____________; Problem types A B C D E Total Score Score obtained 10 20 24 30 16 Markers’ signature Simple questions (2 mark for each question; total score 10) There are three kinds of strains which cause the changes of matter forms. What are they? Vectorsare in one plane and the angle between is 45(. (1) What is the obvious difference between and ? (2) If , Give your results for them respectively. Is the acceleration of a simple harmonic oscillator (振动器) ever zero? If so, where? What are the standard conditions for a wave function that is a solution of a Schr?dinger equation? What are the coherent conditions for two mechanical waves? Right or wrong (2 mark for each question; total score 20) The object distance is always positive if the object is on the side of the lens from which the light is coming. ( right ( wrong Two steel spheres of radii R1 and R2 are put in a deep tank which contains viscous fluid, the one with bigger radius goes down slower than the other because the fluid is viscous. ( right ( wrong The hardness of x-rays depends only on the intensity of x-rays photon. ( right ( wrong The equations of the two SHMs are given by as they are out of phase, the amplitude of the superposition vibration is 5 cm. ( right ( wrong As the molecules of surface-active agents tend to move to the inside of liquid, it can greatly reduce the surface tension coefficient of the original liquid. ( right ( wrong The wavelength of the scattered light in Compton effect experiment becomes shorter because it lost some energy during the process of the collision with electron. ( right ( wrong When light travels through a medium with refractive index 1.5, its wavelength will become shorter and therefore its frequency will become higher in order to maintai