Question

Match the LIST-I with LIST-II:

List-I		List-II
A.	Radio-wave	I.	is produced by Magnetron valve
B.	Micro-wave	II.	due to change in the vibrational modes of atoms
C.	Infrared-wave	III.	due to inner shell electrons moving from higher energy level to lower energy level
D.	X-ray	IV.	due to rapid acceleration of electrons

Choose the correct answer from the options given below:

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

Hint:

Always remember radiation types by their origin: antennas (radio), magnetron (microwave), vibration (infrared), inner electrons (X-rays).

Answer 1

The Correct Option is A

Step 1: Radio-waves (A).
Radio-waves are produced due to rapid acceleration of electrons in transmitting antennas.
Hence, A $\rightarrow$ IV.
Step 2: Micro-waves (B).
Micro-waves are generated using a magnetron valve.
Hence, B $\rightarrow$ II.
Step 3: Infrared-waves (C).
Infrared radiation is mainly produced due to vibrational motion of atoms and molecules.
Hence, C $\rightarrow$ I.
Step 4: X-rays (D).
X-rays are produced due to inner shell electronic transitions.
Hence, D $\rightarrow$ III.
Step 5: Final conclusion.
The correct matching is A-IV, B-II, C-I, D-III, corresponding to option (1).