Published by:
CGP EDU Academic Team
Published on: September 12, 2026
characteristic 
-ray refers to the transition
A
to 
B
to 
C
to 
D
to 
Text Solution
Verified by ExpertsThe correct answer is:
A
Step 1: The characteristic X-ray $ ext{K}_{\alpha}$ refers to the transition of an electron from the second energy level (n=2) to the first energy level (n=1).
Step 2: In this process, an electron from the $n=2$ level drops to the $n=1$ level, emitting a photon of X-ray radiation. This transition corresponds to an increase in energy, hence the emission of X-rays.
Therefore, the correct transition is indicated in Option A.
Step 2: In this process, an electron from the $n=2$ level drops to the $n=1$ level, emitting a photon of X-ray radiation. This transition corresponds to an increase in energy, hence the emission of X-rays.
Therefore, the correct transition is indicated in Option A.
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