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

Evaluate the tension in the rope, Evaluate the tension in the rope A m...

Evaluate the tension in the rope A muscle builder holds the ends of a masslessrope. At the center of the rope, a 15kg ball is hung. What is the tension in the rope if the angl

Motion on inclined plane, a body is thrown horizontally with a velocity of ...

a body is thrown horizontally with a velocity of u from the top of a tower. the displacement of the stone when the horizontal and vertical velocities are equal is

Reflection of a pulse at a free end, Reflection of a Pulse at a Free End ...

Reflection of a Pulse at a Free End Let's assume a pulse moving by a medium - perhaps by a rope or a slinky. What happens to the pulse while it reaches the end of in which medi

Explain right hand rule, Right hand Rule: James clark Maxwell proposed ...

Right hand Rule: James clark Maxwell proposed a rule to search the direction of magnetic lines of force around a wire carrying current.  This rule states. "If a current carr

Physics project, I want a physics project working model on magnet.

I want a physics project working model on magnet.

Explain acceleration due to gravity, ACCELERATION DUE TO GRAVITY. In th...

ACCELERATION DUE TO GRAVITY. In the absence of air resistance, all objects in free fall near the surface of the earth move in the direction of the earth with a uniform accelera

Universal age paradox, Universal age paradox Two most straightforward ...

Universal age paradox Two most straightforward methods of computing the age of the Universe through redshift measurements, and stellar evolution yield incompatible results. Re

Vectors, The helicopter view in fig. p3.29

The helicopter view in fig. p3.29

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