GKFix MCQ Question

Calculate the energy of a radiation source if it emits 2.5 × 10^15 photons in a 2 ns pulse.

• A. 3.0 × 10^-19 J
• B. 4.0 × 10^-19 J
• C. 5.0 × 10^-19 J
• D. 6.0 × 10^-19 J