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

Three phase system over single phase system, Advantages and disadvantages o...

Advantages and disadvantages of three phase system over single phase system    1. In a single phase circuit the power distributed is pulsating. In three-phase system the total

Young modules, to measure the extension of an experimental wire due to diff...

to measure the extension of an experimental wire due to different pulling forces using searle''s apparatues.hence, determine the young modules of the material of the wire.

Explain the meaning of ram effect?, A ram-air intake is any intake design w...

A ram-air intake is any intake design which uses the dynamic air pressure produced by vehicle motion to increase the static air pressure inside of the intake manifold on an engine,

Whomehole, What is whomehole and how it

What is whomehole and how it

How much work is the wind doing on the locomotive, A train locomotive whose...

A train locomotive whose mass is 1 x 106 kilograms is travelling EAST at a speed of 100 kilometers per hour.  A NORTHERLY wind is applying a force of 100 Newtons on the locomo

Needs of light sources for fibre optic communication, What are the needs of...

What are the needs of light sources for fibre optic communication? Light sources for fibre optic communication should meet certain given requirements as illustrated below: a

Volume resistance and surface resistance, Volume resistance: The resistanc...

Volume resistance: The resistance provided to the current which flows through the material is called volume resistance. For a cube of unit dimensions this is called volume resisti

Low of succeve disintigration, Dirive an expretion for low of succecive dis...

Dirive an expretion for low of succecive disintigretion

Bacteria, malaria is caused by? please tell me

malaria is caused by? please tell me

State parallelogram law of forces, State parallelogram law of forces. P...

State parallelogram law of forces. Parallelogram Law can be assured as if two forces acting at a point are represented in magnitude and direction by the adjacent sides of a par

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