See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

According to the law of conservation of momentum, momentum lost by photons = momentum gained by glow-worm Momentum lost by photons = no of photons x momentum lost by one photon = Totalenergy h h h × Debroglie'equation λ = .p = energy of 1photon λ p λ       power ×time h = × hc λ λ λ h ×power×time× hc λ =  8