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Atomic Structure : Where I am wrong?

Atomic Structure : Where I am wrong?

by Anshul Chanchlani -
Number of replies: 4

  The Kinetic energy of a sub-atomic particle is 5.65 * 10-25 J. Calculate the frequency of the particle wave.

Ans. K.E. = 5.65 * 10-25 J

       K.E.= 0.5 mv2

       v2 =   2 K.E. / m   , v = 1.11 *103 ms-1

       Wavelength = h / mv   

            c /frequency = h /mv where c = speed of light

         frequency = cmv/h

        But on putting values the answer does not match with the given answer that is 1.705 *10-9 s-1 .

So what is the correct solution?

In reply to Anshul Chanchlani

Re: Atomic Structure : Where I am wrong?

by Manish Verma -

It could possibly be a problem related to mass. What is the value of mass given in the question?

In reply to Manish Verma

Re: Atomic Structure : Where I am wrong?

by Anshul Chanchlani -
The value of mass is not given in the question. Its just given about a sub-atomic particle.