Q40 (2024)
Match List I with List II:
<div style="overflow-x: auto; margin: 1rem 0;"><table style="width: 100%; border-collapse: collapse; text-align: left; font-size: 14px;"><thead><tr><th style="border: 1px solid #888; padding: 8px;" colspan="2">List-I (Electromagnetic wave)</th><th style="border: 1px solid #888; padding: 8px;" colspan="2">List-II (Production)</th></tr></thead><tbody><tr><td style="border: 1px solid #888; padding: 8px;">A.</td><td style="border: 1px solid #888; padding: 8px;">Microwave</td><td style="border: 1px solid #888; padding: 8px;">I.</td><td style="border: 1px solid #888; padding: 8px;">Electrons in atoms emit light when they move from a higher energy level to a lower energy level</td></tr><tr><td style="border: 1px solid #888; padding: 8px;">B.</td><td style="border: 1px solid #888; padding: 8px;">Visible light</td><td style="border: 1px solid #888; padding: 8px;">II.</td><td style="border: 1px solid #888; padding: 8px;">Radioactive decay of nucleus</td></tr><tr><td style="border: 1px solid #888; padding: 8px;">C.</td><td style="border: 1px solid #888; padding: 8px;">Gamma rays</td><td style="border: 1px solid #888; padding: 8px;">III.</td><td style="border: 1px solid #888; padding: 8px;">Vibration of atoms and molecules</td></tr><tr><td style="border: 1px solid #888; padding: 8px;">D.</td><td style="border: 1px solid #888; padding: 8px;">Infra-red rays</td><td style="border: 1px solid #888; padding: 8px;">IV.</td><td style="border: 1px solid #888; padding: 8px;">Klystron valve or magnetron valve</td></tr></tbody></table></div>
Choose the correct answer from the options given below:
- \text{(1) A-III, B-I, C-II, D-IV}
- \text{(2) A-III, B-IV, C-I, D-II}
- \text{(3) A-IV, B-III, C-II, D-I}
- \text{(4) A-IV, B-I, C-II, D-III}
### Related Formula
$c = f \lambda$
### Core Logic
A. Microwave $\rightarrow$ Klystron valve or magnetron valve (IV)
B. Visible light $\rightarrow$ Electrons transitions in atoms (I)
C. Gamma rays $\rightarrow$ Radioactive decay of nucleus (II)
D. Infra-red rays $\rightarrow$ Vibration of atoms and molecules (III)
### Pattern Recognition
EM wave spectrum production sources.
### Evaluation Rubric / Model Answer
null
### Chapter Mix
Class 12 Physics: Electromagnetic Waves
