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سؤال وجواب في الفيزياء الحديثة Modern physics
[عزيزى الزائر لايمكنك مشاهده الروابط الا بعد التسجيلللتسجيل اضغط هنا] Rest mass energy of electron is 1.02MeV 0.511KeV 0.511MeV 2.02MeV ----------------------------------------------------------------------------- When K.Emax of photoelectrons is zero then frequency of incident photon relative to threshold frequency is less equal greater small -------------------------------------------------------------- Mass of 700N man moving in car at 66km/h is 70kg 100kg infinite zero ------------------------------------------------------------------- An inertial frame of reference is frame in which first law of motion is valid in which law of inertia is valid which is not moving with uniform velocity both a and b ------------------------------------------------------------------------ In photocell cesium, coated oxidized silver cathode emits electrons for visible light ultraviolet infrared light x-rays |
[عزيزى الزائر لايمكنك مشاهده الروابط الا بعد التسجيلللتسجيل اضغط هنا]
According to theory of relative mass of an object is depends on particles speed of light volume of object area of object --------------------------------------------------------------------------------- Radiation with energy that is easily detected as quanta 1eV 1keV 1MeV 10-10eV ----------------------------------------------------------------------- Special theory of relativity treats problems involving inertial frame of reference non-inertial frame of reference non-accelerated frame of reference accelerated frame of reference ----------------------------------------------------------------------------------- According to special theory of relativity which one is not an absolute quantity time mass height both a and b ----------------------------------------------------------------- In e/m experiment we assume nature of electron as wave particle photon both a and b |
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