Question

Which one of the following options is the most appropriate match between the items given in Column 1 and Column 2? 

• A. (i) - T; (ii) - P,S,T; (iii) - Q,R; (iv) - S
• B. (i) - P,T; (ii) - S; (iii) - R,S; (iv) - S,T
• C. (i) - T; (ii) - R,S; (iii) - Q,R; (iv) - S
• D. (i) - S,T; (ii) - P,S; (iii) - R,T; (iv) - S

Hint:

For atomic and nuclear physics, the type of radiation (e.g., X-rays, gamma rays, etc.) determines its associated effects, such as transition between energy levels or material analysis.

Answer 1

The Correct Option is A

- (i) Visible light: This corresponds to the photoelectric effect, which is a well-known phenomenon related to visible light, where photons eject electrons from a material. Thus, it matches with (T) from Column 2.
- (ii) X-rays: X-rays are generally associated with transitions between core energy levels of atoms, thus matching with (P). They also produce the photoelectric effect (T), making it a good match for all three terms.
- (iii) Gamma rays: Gamma rays typically cause transitions between nuclear energy levels, resulting in their matching with (Q) from Column 2. Gamma rays are also involved in pair production, hence matching with (R).
- (iv) Thermal neutrons: Thermal neutrons are used in crystallography and material analysis for structure determination, matching with (S).