Two continuous-wave lasers each deliver the same power to a target

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

Two continuous-wave lasers each deliver the same power to a target. Laser A operates at a wavelength of

600\,\text{nm}

, while Laser B operates at

300\,\text{nm}

. Which laser delivers a greater number of photons per second to the target? Briefly explain your reasoning in one or two sentences.