Uncertainty in Measurement

Aphoton of energy 4.5 eV strikes on a metal surface of work function 3.0 eV. If uncertainty in position is (25)/(4pi)Å, find the uncertainty in measurment of deBroglie wavelength (inÅ ).

According to Heisenberg's uncertainty principle, on increasing the wavelength of light used to locate a microscopic particle, uncertainly in measurement of position of particle :

If uncertainties in the measurement of position and momentum are equal, then uncertainty in the measurement of velocity is

If uncertainties in the measurement of position and momentum of an electrona re equal, calculate uncertainty in the measurement of velocity.

If uncertainty in the measurement of position and momentum of an electron are equal then uncertainty in the measurement of its velocity is approximatly:

[" Uncertainty in measuring speed of a "],[" particle is numerically equal to "],[" uncertainty in measuring its position."],[" The value of these uncertainties will "],[" be "],[" (1) equal to "sqrt((h)/(4 pi m))],[" (2) less than "sqrt((h)/(4 pi m))],[" (3) greater than "sqrt((h)/(4 pi m))],[" (4) (1) or (3) "]