Discuss experimental results of Geiger-Marsden's α -particle scattering.

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12.Atoms

hard

Discuss the experimental results of Geiger-Marsden's $\alpha $ -particle scattering.

Option A

Option B

Option C

Option D

Solution

A typical graph of the total number of $\alpha$-particles scattered at different angles in a given interval of time is shown in below figure.

The dots in this figure represent the data points and the solid curve is the theoretical prediction based on the assumption that the atom has positively charged nucleus.

Many of the $\alpha$-particles pass through the foil.

It means that they do not suffer any collisions.

Only about $0.14 \%$ of the incident $\alpha$-particles scatter by more than $1^{\circ}$ and about $1$ in $8000$ deflect by more than $90^{\circ}$.

Standard 12

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The diagram below shows the lowest four energy levels for an electron in a hypothetical atom.The electron is excited to the $-1\,eV$ level of the atom and transitions to the lowest energy state by emitting only two photons. Which of the following energies could not belong to either of the photons ? …..$eV$

normal

What is head-on collision ? For that tell the impact parameter.

medium

In an alpha particle scattering experiment distance of closest approach for the $\alpha$ particle is $4.5 \times 10^{-14} \mathrm{~m}$. If target nucleus has atomic number $80$ , then maximum velocity of $\alpha$-particle is . . . . .. $\times 10^5$ $\mathrm{m} / \mathrm{s}$ approximately.

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hard

(JEE MAIN-2024)

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easy

Discuss the experimental results of Geiger-Marsden's $\alpha $ -particle scattering.

Solution

Similar Questions

In 1911 , the physicist Ernest Rutherford discovered that atoms have a tiny, dense nucleus by shooting positively charged particles at a very thin gold foil. A key physical property which led Rutherford to use gold was that it was

What is head-on collision ? For that tell the impact parameter.

What is the atomic number of gold ?

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