Figure 4 shows a Geiger Muller (G.M,) tube.

      

Figure 4 shows a Geiger Muller (G.M,) tube.
physics6620171116.jpg
(i) Give the reason why the mica window is made thin
(ii) Explain how the radiation entering the tube through the window is detected by the tube.
(iii) What is the purpose of the halogen vapour?

  

Answers


John
(i) To allow all radiations to penetrate

(ii) On entering the tube, the radiation ionizes argon gas. The positive ions flows towards the cathode and negative ions towards the anode. This creates potential difference that results to flow of pulse current.

(iii) To absorb the energy of positive ions before they cause secondary electron emission.
johnmulu answered the question on June 6, 2017 at 08:22


Next: What are the characteristics of the Savannah vegetation?
Previous: What is mechanical weathering?

View More Physics Questions and Answers | Return to Questions Index


Exams With Marking Schemes

Related Questions