Question

State the laws of radioactive emissions.

   State the laws of radioactive emissions.

Physics (Class 10)

Physics (Class 10)

Trishna Knowledge… 2nd Edition

Chapter 9, Problem 31

Instant Answer

Solved by Expert Ajay Singhal

07/31/2021

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Radioactive emissions primarily include alpha particles, beta particles, and gamma rays. Each type of emission has distinct characteristics and laws governing its behavior. Show more…

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Key Concepts

Inverse-Square Law for Radiation

The inverse-square law describes how the intensity of radiation decreases with distance from its source. Specifically, the intensity is inversely proportional to the square of the distance from the source, meaning that doubling the distance reduces the exposure to one-fourth. This principle is fundamental in understanding radiation safety and the effective dispersion of radioactive emissions.

Half-Life Concept

Half-life is the period over which half of the radioactive nuclei in a sample decay. It is a critical parameter for characterizing the stability of a radioactive isotope and is derived from the exponential decay law. The value of the half-life helps in determining the rate of decay and in predicting the remaining amount of a radioactive substance over time.

Exponential Decay Law

This law states that the rate of radioactive decay is proportional to the number of undecayed nuclei present at any given time. As a result, the number of radioactive atoms decreases exponentially over time, following the mathematical form N(t) = N?e^(–?t), where N? is the initial number of atoms, ? is the decay constant, and t is time.

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