Question

Match the LIST-I with LIST-II.

LIST-I	LIST-II
A. Total Internal Reflection B. LASER C. BCS Theory D. Phonons	I. Quanta of Lattice Vibration II. Cooper pair III. Optical Fibers IV. Stimulated Emission

Choose the correct answer from the options given below:

• A. A-III, B-IV, C-II, D-I
• B. A-II, B-I, C-IV, D-III
• C. A-IV, B-III, C-I, D-II
• D. A-II, B-II, C-IV, D-I

Hint:

Remember:
• Optical fiber $\rightarrow$ Total internal reflection
• LASER $\rightarrow$ Stimulated emission
• BCS theory $\rightarrow$ Cooper pairs
• Phonons $\rightarrow$ Lattice vibration quanta

Answer 1

The Correct Option is A

Concept: Matching questions test conceptual understanding and association between physical phenomena and their applications or definitions. We identify each term carefully and connect it with the most appropriate description.

Step 1: Match Total Internal Reflection. Total Internal Reflection occurs when:
• Light travels from denser to rarer medium.
• Angle of incidence exceeds critical angle. Major application: \[ \boxed{ \text{Optical Fibers} } \] Thus: \[ A \rightarrow III \]

Step 2: Match LASER. LASER works on: \[ \boxed{ \text{Stimulated emission} } \] LASER full form: Light Amplification by Stimulated Emission of Radiation Thus: \[ B \rightarrow IV \]

Step 3: Match BCS Theory. BCS theory explains superconductivity using: \[ \boxed{ \text{Cooper pairs} } \] Thus: \[ C \rightarrow II \]

Step 4: Match Phonons. Phonons are: \[ \boxed{ \text{Quanta of lattice vibrations} } \] Thus: \[ D \rightarrow I \]

Step 5: Write complete matching. Therefore: \[ A-III,\quad B-IV,\quad C-II,\quad D-I \]

Step 6: Choose the correct answer. Hence the correct option is: \[ \boxed{(1)} \] Final Conclusion: Correct matching: \[ \boxed{ A-III,\ B-IV,\ C-II,\ D-I } \] Hence, the correct answer is: \[ \boxed{(1)} \]