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ICAR JRF Agricultural Physics 29 Jun 2024Shift 1
Assertion & Reason +4 −1

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A) : Beer’s law is not valid when absorbing material is coagulated
Reason (R) : There may be large areas of open space through which radiation can pass and absorption will decrease

In light of the above statements, choose the correct answer from the options given below.

  • Assertion (A) is True: Beer's Law ($I = I_0 e^{-\alpha c l}$) is valid only for homogeneous, non-interacting, molecularly dispersed absorbing media; when absorbing particles coagulate or flocculate into clumps, the linear relationship breaks down.
  • Reason (R) is True: Flocculation concentrates absorbers into discrete clumps, creating large open inter-particle spaces where radiation passes without interaction ("sieve effect"), substantially reducing total light extinction.
  • Relationship: Because particle coagulation creates open clear pathways for unattenuated radiation passage, Reason (R) provides the exact physical explanation for Assertion (A).
  • Conclusion: Both (A) and (R) are true and (R) is the correct explanation of (A) (Option 1).

Correct option: (1) Both (A) and (R) are true and (R) is the correct explanation of (A)

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report
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