Home
Class 12
PHYSICS
Why is that mass of nucleus does not ent...

Why is that mass of nucleus does not enter the formula for impact parameter but its charge does?

Text Solution

Verified by Experts

The scattering of `alpha`-particle occurs due to electrostatic field of the nucleus. That is why charge on nucleus enters the expression for impact parameter and not its mass.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ATOMS AND NUCLEI

    PRADEEP|Exercise Short Answer question 4|1 Videos

  • ATOMS AND NUCLEI

    PRADEEP|Exercise (I) Conceptual Problems 1|1 Videos

  • ATOMS AND NUCLEI

    PRADEEP|Exercise (II) very short answer 16|1 Videos

  • COMMUNICATION SYSTEMS

    PRADEEP|Exercise MODEL TEST PAPER-2|9 Videos

Similar Questions

Explore conceptually related problems

for scattering by an inverse square law field (such as that produced by a charged nucleus in Rutherford's model), the relation between impact parameter b and the scattering angle theta is given by b=(Ze^2 cot theta//2)/(4pi in_0(1/2mv^2)) (a) What is the scattering angle for b=0? (b) for given impact parameter, b, does the angle of deflection increase or decrease with increase in energy? (c) What is the impact parameter at which the scattering angle is 90^@ for Z=79 and initial energy=10MeV? (d) Why is it that the mass of the nucleus does not enter the formula above, but its charge does? (e) for a given energy of the projectile, does the scattering angle increase or decrease with decrease in impact parameter?

The mass defect in the nucleus is explained by the formula

Knowledge Check

  • Which one does not enter nephron

    A
    Water
    B
    Glucose
    C
    Plasma proteins
    D
    Urea

  • The food does not enter the windpipe due to

    A
    Glottis
    B
    Epiglottis
    C
    Pharynx
    D
    Larynx

  • An alpha- paticle approaches the target nucleus of copper (Z = 29) is such a way that the vlaue of impact parameter is zero. The distance of closest approach will be

    A
    `(2pi epsilon_(0)(K.E.)_(alpha))/(29e^(2))`
    B
    `(29e^(2))/(2pi epsilon_(0)(K.E.)_(alpha))`
    C
    `(4pi epsilon_(0)(K.E.)_(alpha))/(29e^(2))`
    D
    `(K.E.)_(alpha)`

    • Similar Questions

    Explore conceptually related problems

    Why does the atomic mass of an element not represent the actual mass of its atom?

    Why is the mass of a nucleus always less than the sum of the masses of its constituents-neutrons and protons?

    Does motion of a body affect its charge ?

    Which atom does not have any neutron in the nucleus?

    For scattering by an inverse-square field (such as that produced by a charged nucleus in Rutherford's model) the relation between impact parameter b and the scattering angle theta is given by, the scattering angle for b=0 is

    Home
    Profile