1. The problem statement, all variables and given/known data Consider an optical tweezer operated in the ray optics regime as shown in Figure. Net reflection angle of the ray shown in Figure is θ = 10◦ (See Figure). Since more photons take the thick ray than the thin ray, a net force of F = 1 pN is exerted on the sphere toward the left. The wavelength of the photon is λ = 1000 nm. Let Nthick and Nthin be the number of photons per second in the thick and thin ray, respectively. Find ∆N = Nthick − Nthin. 2. Relevant equations p = h/λ E = hf f = c/λ F = dp/dt 3. The attempt at a solution I feel like there is not enough information given in this problem to solve for the total number of photons. I know in the Ray Optics Regime: Fscat = (nm*P)/c(1+Rcos(2ΘR)-TF2(cos(2ΘR-2ΘT)+Rcos(2ΘR)/1 + R2 + 2Rcos(2ΘT)) Fgrad = (nm*P)/c(1+Rsin(2ΘR)-TF2(sin(2ΘR-2ΘT)+Rcos(2ΘR)/1 + R2 + 2Rcos(2ΘT)) I am not sure with the given information how to manipulate these equations to determine the solution or if I am overthinking. Please Help!!!!!