Teaching Haryana (HPSC) Assistant Professor Mock Test 2025 Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect
When the electromagnetic radiations of frequencies 4 × 1015 Hz and 6 × 1015 Hz fall on the same metal in different experiments, the ratio of maximum kinetic energy of electrons liberated is 1 : 3. The threshold frequency for the metal is
1
2 × 1015 Hz
2
1 × 1015 Hz
3
3 × 1015 Hz
4
1.67 × 1015 Hz
5
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