Question

The fluorescent radiation is absorbed by placing a filter when__________

(a) It is weak

(b) It is strong

(c) It is too much in quantity

(d) It holds more energy

I have been asked this question in class test.

My doubt stems from Sources of Background Radiation Fluorescence in chapter X-Ray Diffraction of Solid State Chemistry

Answer 1

The correct option is (a) It is weak

The explanation is: Fluorescent occurs when the sample acts as a secondary source of X-rays. If the fluorescent radiation is weak it may be absorbed by placing a filter between the sample and detector, e.g. a strip of nickel foil placed over the film.