A laser is used in eye surgery to weld a detached retina back into place. The wavelength of the laser beam is 611 nm, while the power is 2.0 W. During surgery, the laser beam is turned on for 0.057 s. During this time, how many photons are emitted by the laser

Iwas going to ask that quesytion  sorry dude i dont  know : (    : /

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.