Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Spectroscopy technique is used for the study of interaction of electromagnetic radiation with matter.
Reason R: It is used for the identification of substances through the spectrum emitted or absorbed by them.

• A. Both A and R are correct and R is the correct explation of A
• B. Both A and R are correct but R is NOT the correct explation of A
• C. A is correct but R is not correct
• D. A is not correct but R is correct

Hint:

Spectroscopy = EMR + Matter Interaction.
Absorption/Emission Spectra = Unique chemical fingerprints used for structural identification and quantitative concentration measurement (Beer-Lambert Law).

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question evaluates the basic scientific definition and alytical purpose of spectroscopy in chemical and biological sciences.

Step 2: Key Formula or Approach:
Spectroscopy is the branch of science concerned with measuring and interpreting the emission and absorption of electromagnetic radiation (EMR) by matter as a function of wavelength or frequency ($E = h\nu$).

Step 3: Detailed Explation:

• Alysis of Assertion A: Spectroscopy is universally defined as the study of interactions between electromagnetic radiation (e.g., UV, visible, IR, microwave) and atomic or molecular matter. Thus, Assertion A is correct.

• Alysis of Reason R: When matter absorbs or emits energy transitions, characteristic discrete spectral lines or broad bands are produced. These emission or absorption spectra serve as unique molecular "fingerprints" used to identify and quantify chemical substances. Thus, Reason R is correct.

• Causal Relationship: The physical mechanism of measuring interactions between EMR and matter (Assertion A) is implemented alytically by recording absorption or emission spectra to identify target substances (Reason R). Thus, R provides the direct explation of how spectroscopy functions as an alytical tool.

Step 4: Fil Answer:
Both A and R are correct, and R provides the correct explation of A.