Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Physics Dual Nature: Photon and Matter Waves
If the threshold wavelength for photoelectric effect on sodium metal is 5000 A° then find its work function.
1
15 J
2
4 × 10-19 J
3
4 × 10-14 J
4
More than one of the above
5
None of the above