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 is a starry sky, What is a starry sky? Probably one of the most be...

What is a starry sky? Probably one of the most beautiful lighting effects which can be created that can be very simple or rather sophisticated. In its simplest form, a starry s

Motion in one dimension, a ball is dropped from a bridge 122.5m high. afte...

a ball is dropped from a bridge 122.5m high. after the ball has been falling for2 sec another is thrown straight downwards after it. the initial velocity of the ball is such that

Comparison between System and Control Volume , Thermodynamics, Similarities...

Thermodynamics, Similarities between System and Control Volume (a) System and Control Volume are defined by careful in description of their boundaries. (b) System and Control Vol

Describe snells law, Out of ordinary and extra-ordinary waves, which wave o...

Out of ordinary and extra-ordinary waves, which wave obeys Snell's law?

Nikol prisom, How nikol prisim can use as polarizer and analyzer

How nikol prisim can use as polarizer and analyzer

Wire wound resistor, MANUFACTURING:   The resistance element is use...

MANUFACTURING:   The resistance element is used as a wire, made from special alloys, which have small low temperature coefficient and good stability against environmental c

What is meant by tunnelling phenomenon, What is meant by tunnelling phenome...

What is meant by tunnelling phenomenon? A tunnel diode is a high conductivity two-terminal P-N junction doped heavily about 1,000 times higher than a conventional junction diod

Explain simple harmonic motion, Explain Simple Harmonic Motion Many rep...

Explain Simple Harmonic Motion Many repeating motion problems can be solved by taking the displacement as   where d is distance in meters, A is amplitude in meters,

Internal resistance of circuit, Internal Resistance of Circuit: As ment...

Internal Resistance of Circuit: As mentioned earlier in the section on batteries, every source of electricity, such as a cell or generator has resistance to current flow called

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