Please answer the question. NOTE: an answer option is missing, this being that the option is known to be incorrect. 18. In a dimly lit room, the intensity of light falling on the pupil is 0.01 W/mz. Using an average wavelength of 500 nm and an average pupil diameter of 5 mm, estimate how many photons are entering the pupil during 0.1 seconds. A. 5 photons B. 500 photons C. 50 million photons D. 50 billion photons