engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Physics Dual Nature: Photon and Matter Waves The Photon, the Quantum of Light
Monochromatic light of wavelength 667 nm is produced by a helium neon laser. The power emitted is 9 mW. The number of photons arriving per second on the average, at a target irradiated by this beam is:
1
3 × 1016
2
9 × 1015
3
3 × 1019
4
9 × 1017