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

Explain point charge - electric field, What are the magnitude and the sign ...

What are the magnitude and the sign of a point charge that experiences a force of   0.48 N east when placed in an electric   field of 1.6 x 10 5 N/C west? Normal 0

What is solenoid? , A solenoid is a coil wound into a tightly packed helix...

A solenoid is a coil wound into a tightly packed helix. In physics, the term solenoid shows  a long, thin loop of wire, often wrapped over a metallic core, which makes a magnetic f

Determine the thrust force, A windmill is operating in a 10 m/s wind that h...

A windmill is operating in a 10 m/s wind that has a density of 1.2 kg/m 3 . The diameter of the windmill is 4 m. The constant-pressure (atmospheric) stream tube has a diameter of 3

Explain noise, Noise: An undesirable and unpleasant sound that makes ha...

Noise: An undesirable and unpleasant sound that makes harmful effects on our auditory system is known as noise.

Describe kirchoffs current law, Describe Kirchoffs Current Law? Ans. It...

Describe Kirchoffs Current Law? Ans. It defines " the current flowing toward a point in a circuit have to be equal to the current flowing away from that point. I = I 1 + I

Physical interpretation of wave function, Physical interpretation of wave f...

Physical interpretation of wave function : Einstein proposed a historic relationship between energy and mass using postulates of STR. The variation of mass with velocity has modif

Integral in amperes law, Question: In estimate the integral one evalua...

Question: In estimate the integral one evaluates in applying Ampere's Law one is Answer: The integral in Ampere's Law is a path integral and the path is an imaginary c

Describe magnetic susceptibility, It is the property of the substance which...

It is the property of the substance which defines how easily a substance  can be magnetized. It may also be defined as the ratio of intensity of magnetization (I) in a substance to

Parts of dc machine, Dc machine consists of the following parts: Field...

Dc machine consists of the following parts: Field system: The object of the field system is to make a uniform magnetic field, within  which the armature rotates. It having of

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