Radiation Q: C Answr w/1cm Alum Plate?

Thread starter User1265
Start date Oct 4, 2019
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Radiation

In summary, radiation is the emission of energy in the form of electromagnetic waves or particles, which can be natural or man-made. "C" refers to the speed of light and "1cm Alum Plate" refers to a 1 centimeter thick plate made of aluminum that can act as a shield against certain types of radiation. The thickness and composition of the plate determines its effectiveness. While radiation can be dangerous in large doses or prolonged exposure, it is also a natural part of our environment and its potential health effects depend on the amount and type of exposure. Proper safety measures and regulations should be followed when working with radiation.

Oct 4, 2019

User1265

Homework Statement: 12. A radioactive source is placed 6 cm from a radiation detector sensitive to all
forms of ionizing radiation, and records 74 counts/minute. When a 1 cm
thick aluminium plate is placed in the gap then the count rate falls to
45 counts/minute. If the source is removed entirely then the count rate
remains the same. If the aluminium plate is removed and the source is
placed 2 cm from the detector, the count rate rises to 5000 counts/minute.
What forms of radiation does the source emit?
A alpha only B beta only
C alpha and beta D alpha and gamma

Why is the Answer A and Not C?

Relevant Equations: Alpha, beta gamma

I thought the answer was C because what's not to say when surface is placed 6 cm from radiation detector beta particles are also present, and that surely all beta particles would be stopped with a 1cm thick aluminium plate?

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Oct 4, 2019

kuruman

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You need to take into account the observation that when the source is removed entirely, the count rate remains the same.

1. What is the purpose of using a 1cm aluminum plate in radiation experiments?

The 1cm aluminum plate is used as a shielding material to block or reduce the amount of radiation that passes through it. This allows scientists to control and measure the effects of different levels of radiation.

2. How does radiation interact with the 1cm aluminum plate?

Radiation can interact with the 1cm aluminum plate in multiple ways, including absorption, scattering, and transmission. The type and amount of interaction depends on the properties of the radiation and the thickness and composition of the plate.

3. Can the 1cm aluminum plate completely block radiation?

No, the 1cm aluminum plate cannot completely block all types of radiation. It can only reduce the amount of radiation that passes through it. The effectiveness of the plate depends on the type and energy of the radiation.

4. What are the potential risks associated with using radiation and the 1cm aluminum plate?

The use of radiation and the 1cm aluminum plate in experiments can pose potential risks to the scientists and the environment. These risks include exposure to radiation, contamination, and accidental release of radioactive material. It is important for scientists to follow safety protocols and regulations to minimize these risks.

5. How do scientists determine the appropriate thickness of the 1cm aluminum plate for their experiments?

The appropriate thickness of the 1cm aluminum plate depends on the type and energy of the radiation being used, as well as the desired level of shielding. Scientists use calculations and simulations to determine the optimal thickness of the plate for their specific experiments.