What is a head-on collision? For that,state the impact parameter.
(N/A) head-on collision occurs when an alpha particle is directed straight towards the center of the nucleus of an atom. In this case,the alpha particle approaches the nucleus,comes to a momentary rest at the distance of closest approach,and then reverses its path back along the same line.
The impact parameter $(b)$ is defined as the perpendicular distance of the initial velocity vector of the alpha particle from the center of the nucleus.
For a head-on collision,the alpha particle is aimed directly at the center of the nucleus,meaning the perpendicular distance between the path of the alpha particle and the center of the nucleus is zero. Therefore,the impact parameter $(b)$ for a head-on collision is $0$.
The impact parameter $(b)$ is defined as the perpendicular distance of the initial velocity vector of the alpha particle from the center of the nucleus.
For a head-on collision,the alpha particle is aimed directly at the center of the nucleus,meaning the perpendicular distance between the path of the alpha particle and the center of the nucleus is zero. Therefore,the impact parameter $(b)$ for a head-on collision is $0$.
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Given below are two statements:
$Statement$ $I$: Most of the mass of the atom and all its positive charge are concentrated in a tiny nucleus and the electrons revolve around it,is Rutherford's model.
$Statement$ $II$: An atom is a spherical cloud of positive charges with electrons embedded in it,is a special case of Rutherford's model.
In the light of the above statements,choose the most appropriate from the options given below.
$Statement$ $I$: Most of the mass of the atom and all its positive charge are concentrated in a tiny nucleus and the electrons revolve around it,is Rutherford's model.
$Statement$ $II$: An atom is a spherical cloud of positive charges with electrons embedded in it,is a special case of Rutherford's model.
In the light of the above statements,choose the most appropriate from the options given below.
DifficultJEE MAIN 2024
View SolutionWhen an $\alpha$-particle of mass $m$ moving with velocity $v$ bombards a heavy nucleus of charge $Ze$,its distance of closest approach from the nucleus depends on $m$ as
MediumNEET 2016
View SolutionAssertion $(A)$: The impact parameter for $\alpha$-particles scattered by $180^{\circ}$ is zero.
Reason $(R)$: Zero impact parameter means that the $\alpha$-particles tend to hit the centre of the nucleus.
Reason $(R)$: Zero impact parameter means that the $\alpha$-particles tend to hit the centre of the nucleus.
In a Geiger-Marsden experiment,what is the distance of closest approach to the nucleus of a $7.7 \;MeV$ $\alpha$-particle before it comes momentarily to rest and reverses its direction?
Medium
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