Prompt emission of X-ray by an atom ionised by a higher energy X-ray is a type of which of the following phenomena?
A. Luminescence
B. Fluorescence
C. Phosphorescence
D. Spontaneous emission
Answer:B
Prompt emission of X-ray by an atom ionised by a higher energy X-ray is a type of which of the following phenomena?
A. Luminescence B. Fluorescence C. Phosphorescence D. Spontaneous emission
Explanation: Prompt emission of X-ray by an atom ionised by a higher energy X-ray is a type of fluorescence. Fluorescence emissions are characteristic of the particular element.