专题18物理光学（Topic 18 physical optics）.docVIP

专题18物理光学（Topic 18 physical optics） Topic 18: physical optics,.Txt iron rice bowl, the real meaning is not to eat a lifetime in a place, but a lifetime to eat everywhere. It is a piece of shit, also have met shikelang day. So you dont have to worry too much about yourself today. Physical optics I. typical examples: [cases of 1] in the double slit experiment, with white light as the light source, observed color interference fringes on the screen, if the double slit in a seam before a red filter (only through red), another joint ago put a green filter (only through green), then () A, only red and green double slit interference stripes, other colors of double slit interference fringes disappeared B, red and green double slit interference fringes disappear, and other colored double slit interference fringes still exist The C and any colored double slit fringes do not exist, but there is still light on the screen D, there is no light on the screen In the double slit interference experiment device in wavelength joint width with light almost, in the double slit were put on the red and green light, red light and green light due to the frequency is not equal, no interference fringes appear in the light on the screen, but due to meet significant diffraction conditions at the same time, so the red and green light in the diffraction pattern on the screen, so the right option for C. [example 2] a metal in a bunch of yellow light, just can have the electron escape (i.e. frequency is less than the yellow light rays could not have electron escape), under the following conditions, the number of runaway electrons and electron maximum initial kinetic energy what will happen? The increasing of light intensity without changing the frequency of light; With the red glow of greater strength instead of yellow light; The violet with the same intensity instead of yellow light. There is an escape of electrons, indicating that the frequency of such yellow light is exactly the limit frequency of