AktiraAktira JEE
Subscribe
PhysicsJEE Main 28 Jan 2026, Shift 2·Q11·MCQ·Easy–moderate

Dual Nature of Radiation and Matter · Photoelectric effect

Number of photons of equal energy emitted per second by a 6 mW laser source operating at 663 nm is . (Given: h=6.63×10−34h = 6.63\times10^{-34} J.s and c=3×108c = 3\times10^{8} m/s)
  1. (1)5×10165\times10^{16}
  2. (2)5×10155\times10^{15}
  3. (3)10×101510\times10^{15}
  4. (4)2×10162\times10^{16}

Video solution coming soon

We're animating every PYQ step by step. Subscribe to get them first.

Subscribe

See the full 28 Jan 2026, Shift 2 paper

More on Photoelectric effect