12th Class Physics Sample Paper Physics Sample Paper-9

  • question_answer The de-Broglie wavelength associated with an electron accelerated through a potential difference V is \[\lambda .\] What will be its wavelength when the accelerating potential increased to 4 V?

    Answer:

    As \[\lambda \propto (1/\sqrt{V}),\] hence on increasing accelerating potential from V to 4V, de-Broglie wavelength decreases from \[\lambda \] to \[\lambda /2.\]


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