Question

Arrange the following materials in ascending order of their probabilities of photo-electric effect for a $100 \text{ keV}$ photon.
A. C
B. O
C. Sn
D. Pb
E. Ca

• A. \(D < C < E < B < A \)
• B. \(A < B < E < C < D \)
• C. \(A < B < C < D < E \)
• D. \(D < E < B < C < A \)

Hint:

Lead (Pb) is used in shielding because its high atomic number ($Z=82$) makes it extremely effective at absorbing high-energy photons via the photoelectric effect.

Answer 1

The Correct Option is B