Home
Class 12
PHYSICS
If uncertainty in position and momentum ...

If uncertainty in position and momentum are equal then uncertainty in velocity is.

A

`sqrt(h/pi)`

B

`(h)/(2pi)`

C

`(1)/(2m)sqrt(h/pi)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
3
`Deltap, Deltax=(h)/(4pi)`
`Deltap=Deltax(Given)`
`(Deltap)^(2)=(h)/(4pi)`
`(mDeltav)^(2)=(h)/(4pi)`
`Deltav=(1)/(2m)sqrt(h/pi)`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MOCK TEST 9

    CAREER POINT|Exercise CHEMISTRY|30 Videos

  • MOCK TEST 8

    CAREER POINT|Exercise Part (B) -CHEMISTRY|28 Videos

  • PRACTICE TEST - 5

    CAREER POINT|Exercise PHYSICS|45 Videos

Similar Questions

Explore conceptually related problems

Werner Heisenberg considered the limits of how precisely we can measure the properties of an electron or other microscopic particle. He determined that there is a fundamental limit to how closely we can measure both position and momentum. The more accurately we measure the momentum of a particle, the less accurately we can determine its position. The converse also true. This is summed up in what we now call the Heisenberg uncertainty principle. The equation si deltax.delta (mv)ge(h)/(4pi) The uncertainty in the position or in the momentum of a marcroscopic object like a baseball is too small to observe. However, the mass of microscopic object such as an electon is small enough for the uncertainty to be relatively large and significant. If the uncertainties in position and momentum are equal, the uncertainty in the velocity is :

Calculate the uncertainty in the position of an electron if the uncertainty in its velocity is 5.77xx10^(5) m s^(-1) .

Knowledge Check

  • It is not possible to determine preciselt both the position and momentum (or velocity) of a small moving particle such as electron, proton etc. This is known as Heisenber uncertainty principle. The mathemactical form of this principle is : Delta x.Delta p ge (h)/(4pi) (constant) However this principle is irrevalent in case of bigger particles such as a cup, ball, car etc., that we come across in our daily life. If uncertainty in position and momentum are equal, the v uncertainty in velocity would be

    A
    `(1)/(2m)sqrt((h)/(pi))`
    B
    `sqrt((h)/(2pi))`
    C
    `sqrt((h)/(pi))`
    D
    None of these

  • Uncertainty in position and momentum are equal. Uncertainty in velocity is

    A
    `sqrt(h/(pi))`
    B
    `sqrt(h/(2pi))`
    C
    `1/(2m)sqrt(h/(pi))`
    D
    none of these

  • If uncertainties in position and momentum are equal , the uncertainty of velocity is given by :

    A
    `sqrt((h)/(pi))`
    B
    `sqrt((h)/(2pi))`
    C
    `(1)/(2m)sqrt((h)/(pi))`
    D
    zero

    • Similar Questions

    Explore conceptually related problems

    Werner Heisenberg considered the limits of how precisely we can measure the properties of an electron or other microscopic particle. He determined that there is a fundamental limit to how closely we can measure both position and momentum. The more accurately we measure the momentum of a particle, the less accurately we can determine its position. The converse is also true. this is summed up in what we now call the Heisenberg uncertainty principal. The equation is Deltax.Delta(mv) ge (h)/(4pi) The uncertainty is the position or in the momentum of a macroscopic object like a baseball is too small to observe. However, the mass of microscopic object such as an electron is small enough for the uncertainty to be relatively large and significant. If the uncertainties in position and momentum are equal, the uncertainty in the velocity is:

    If uncertainty in position are velocity are equal the uncertainty in momentum will be

    If uncertainty in momentum is twice the uncertainty in position of an electron then uncertainty in velocity is (h=(h)/(2pi)) :

    A german physicist gae a principle about the uncertainties in simultaneous measurement of position and momentum of small particles. According to that physicist. It is impossible to measure simultaneously the position and momentum of small particle with absolute accuracy or certainty. if an attempt is made to measure any one of these two quantities with higher accuracy, the other becomes less accurate. The produce of the uncertainty in position (Deltax) and uncertainty momentum (Delta p) is always constant and is equal to or greater than h//4pi , where h is Planck's constant i.e. (Deltax ) (Deltap) ge (h)/(4pi) If uncertainty in momentum is twice the uncertainty in position of an electron then uncertainty in velocity is: [bar(h)=(h)/(2pi)]

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

    Home
    Profile