Describe positive rays, Physics

Assignment Help:

Positive rays are sometimes called as the canal waves. These were found by Goldstein. If the cathode of a discharged tube has holes in it and the pressure of the gas is around 10-3 mm of Hg then faint luminous glow comes out from every hole on the backside of the cathode. It is supposed positive pulses which are rolling out from the holes.     

785_22.png

 

Origin of positive rays: When potential dissimilarity is applied across the electrodes, electrons are gone from the cathode. As they move in the direction of anode, they gain power. These energetic electrons when hit with the atoms of the gas in the discharge tube, they ionize the atoms. The positive ions so formed at several places between cathode and anode travel towards the cathode. As during their motion, the positive ions when arrives the cathode, some pass by the holes in the cathode. These branches are the positive pulses.

 

 


Related Discussions:- Describe positive rays

What do you understand by rectifier, What do you understand by rectifier? I...

What do you understand by rectifier? Illustrate working of half wave and full wave rectifiers with diagrams. Show the expression for its efficiency? Define a transistor and illu

Hydrogen spectrum and spectral series, When hydrogen atom is excited, it re...

When hydrogen atom is excited, it returns to its normal unexcited (or ground state) state by emitting the energy it had absorbed previous. This energy is given out by the atom in t

Define properties of cement mortar, Properties of cement mortar 1. It sh...

Properties of cement mortar 1. It should make good adhesion with building units like bricks, stones etc. 2. It should be capable of resisting penetration of water. 3. It s

Sound, compostion of two simple harmonic motion

compostion of two simple harmonic motion

Image of an object formed in converging thin lens, A converging thin lens h...

A converging thin lens has a focal length of 27 centimetres. An object is placed 9 centimetres from the lens.  Where is the image of this object formed? Ans: The images of g

Tunneling and tunneling applications, Q.   What is quantum mechanical "Tunn...

Q.   What is quantum mechanical "Tunneling"? Give one example. OR What do you mean by quantum mechanical tunneling? Show that the tunneling probability is given by the

Special resistor materials: tin, Tin: Atomic number ...

Tin: Atomic number 50 Symbol Sn Atomic weight 118.69 Discovery Known since ancient

Honors, an orchestra tunes up for the big concert by playing an A, WHICH RE...

an orchestra tunes up for the big concert by playing an A, WHICH RESOUNDS WITH A FUNDAMENTAL FREQUWNCY OF 440HZ FIND THE SECOND AND TIRD HARMONICS OF THIS NOTE

Explain how will you perform ward radiography, Question 1. Explain how ...

Question 1. Explain how will you perform ward radiography? 2. Discuss the radiographic projections recommended for imaging the first to third cervical vertebrae? 3. Write

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