Rutherford’s gold - foil experiment , Physics

Assignment Help:

An α particle is a positively charged particle.
Rutherford observed the behaviour of these particles when they approach the interior of the atoms as shown in fig. 

Rutherford observed that most of the α particles like a, a1 , pass through the atom un deflected.

2343_Rutherfords gold foil experiment with.png

Some of the particles like b, b1  get scattered by the atom at smaller angles of deflections. The particles like c, c1  undergo large deflection at an angle less than 180o  but more than 90o . The particles like ‘d' get deflected such that they are sent back as d1  with an angle of 180o.
Such large - angle deflections require strong forces to be acting on the α particles. Rutherford argued that this would be possible if all the positive charges and mass of the atom was concentratedin a very small central region which he called the nucleus of the atom. Then the large angle deflections of α particles are c, c1, due to electric repulsive forces caused by the nucleus. From the data obtained in this experiment Rutherford calculated the radius of the nucleus and found it to be shorter than 2.4×10-15m. Because the mass of the electron is only about 1/7000th mass of an alpha particle, the effect of the presence of electrons inside the atom on the deflection of the alpha particles can safely be ignored.

 


Related Discussions:- Rutherford’s gold - foil experiment

Internal resistance of a cell, When is the combination of cells advantageou...

When is the combination of cells advantageous and why? (Mar 2009) What do you mean by internal resistance of a cell? Write down the value of internal resistance of an ideal cell

Galilean relativity, Galilean Relativity Galilean invariance or Galilea...

Galilean Relativity Galilean invariance or Galilean associatively states which the laws of motion are the similar within all inertial frames. Galileo Galilei first define this

Descrieb the types of magnetic material, On the basis of mutual interaction...

On the basis of mutual interactions or behavior of several materials in an external magnetic field, the materials are dividing in three basic categories. (i) Diamagnetic materi

How can light be classify in simplest form, How can light be classify in si...

How can light be classify in simplest form? Answer:- The common description of light (visible) is electromagnetic radiation visible to the human eye. It is only a little p

Theory to calculate magnetic moment of a bar magnet, Illustrate ‘tan A ‘and...

Illustrate ‘tan A ‘and ‘tan B' positions of a deflection magnetometer. Illustrate the theory to calculate magnetic moment of a bar magnet and Horizontal component of the earths

Projects of electomagnetic induction, i want to do a project of physics the...

i want to do a project of physics the topic is electo magnetic induction. i want d topic and procedure

Example, example of like paralle forces

example of like paralle forces

., what is radioactivity?

what is radioactivity?

What is the final frequency of the piano string, Suppose you sound a 1056-H...

Suppose you sound a 1056-Hz tuning fork at the same time you strike a note on the piano and hear 2 beats/second.  You tighten the piano string very slightly and now hear  3 beats/s

Process to calculate teh number of atoms per unit cell, Process to calculat...

Process to calculate teh number of atoms per unit cell The number of atoms per unit cell is equal to the product of 'the number of atoms per basis' and 'the number of basis per

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd