engineering recuitment AAI ATC Junior Executive 2025 Mock Test Series Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect
A 5 watt source emits monochromatic light of wavelength 5000 Å. When placed 0.5 m away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of 1 m, the number of photoelectrons liberated will
1
Be reduced by a factor of 2
2
Be reduced by a factor of 4
3
Be reduced by a factor of 8
4
Be reduced by a factor of 16