Investigating penetrating powers

Question 1

What apparatus will we use?

Answer 1

• -> Geiger-Muller tube
• -> Counter
• -> Rdioactive source

Question 2

What measurements will we take?

Answer 2

–> counts

Question 3

How will we set up the apparatus?

Answer 3

–>Connect GM tube to counter

• ->(after BR measured)
• ->place RS 3 cm away
• -> Take some absorbers(e.g paper, lead. alluminium)

Question 4

How will you make it a fair test?

Answer 4

• -> Same distance

- ->Same time

Question 5

What safety procedures will you need to follow?

Answer 5

• -> When not using, LEAD-LINED container
• ->When in use, keep distance (1m)
• ->When handling, use tweezers/ TONGS

Question 6

Describe the method.

Answer 6

1. Measure BR
   –> connect GM tube to counter
   (no sources present)
   –> Measure
   –>repeat 3 times
   –> take an AVERAGE

2.                               - ->Place RS 3cm away
                                     - -> Take some absorbers(e.g: paper,sev. diff. thickness of lead, aluminium)
                                       - ->Measure after one min.
                                             - -> repeat for o. RAD sources

Question 7

What would the conclusions be?

Answer 7

• -> stopped by paper, alpha
• ->stopped by few mm aluminium, beta
• –>could penetrate few cm of lead,gamma