Please explain the answer, when answering this I thought of E=hc and I couldn’t recall any formulas having to do with intensity regarding photons. Thank you!
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Energy carried away by a single photon (particles that make up EM radiation) is given by Planck's law where h is the Planck's…View the full answer
Transcribed image text: Passage 3 (Questions 14-17) Researchers are designing a micro-robot equipped with an oxygen sensor for intraocular procedures. The micro-robot will be injected into the patient's eye to determine if a blood clot is present. The micro-robot is powered by electromagnetic radiations that induce a current in its interior circuit. The current powers a motor that propels the micro-robot through the fluid of the vitreous humor. Inside the eye, the micro-robot experiences a viscous drag force F dependent on the vitreous humor viscosity n, and the micro-robot's diameter d and velocity v: F = -3 dyv Equation 1 The micro-robot uses a luminescent sensor film to determine the oxygen concentration, and potential blood clots, in the retina. In this method, a blue LED is shined into the eye and strikes the surface of the sensor. The sensor coating absorbs the photons from the LED and a short tilne later emits photons that are subsequently detected by a photodiode (Figure 1). Experiments in which oxygen parameters were controlled showed that oxygen, if present in the retina, affects both the time it takes the sensor to emit the photons and the intensity of the emitted radiation Photodiode ♡ ♡ Blue LED Vitreous humor Page 110 of 158 1 of 57985 words UK English (United States) If the results of the test indicate that the patient has a clot that is obstructing blood flow, a second micro-robot, coated with tissue plasminogen activator (t-PA), is steered to the thrombus site where it punctures and docks with a retinal vein. The enzyme t-PA is a serine protease that converts plasminogen into plasmin, which subsequently degrades the clot by fibrinolysis The intensity of the radiation emitted by the oxygen sensor is directly proportional to the A. propagation speed of the radiation. B. wavelength of the radiation. C. polarization of photons emitted. D. number of photons emitted. Solution: The correct answer is D. This is a Physics question that falls under the content category “How light and sound interact with matter.” The answer to this question is D because the energy of electromagnetic radiation is directly proportional to the number of photons, and the intensity of electromagnetic radiation is defined as energy emitted per unit time. Thus, intensity is directly proportional to the number of photons emitted. It is a knowledge of Scientific Concepts and Principles question because you are asked to identify a relationship between closely related concepts.