The doctors would be able to give Type A, Type B, Type O and Type AB
Answer:
Light bounces off surfaces property most likely believed by Janssen about light during the time of his invention
Explanation:
Zacharias Janssen is ascribed as a man to discover the compound microscope. Its purpose is to amplify diminutive things so characters can analyze them. There is a mirror attached under the microscope and when light bounces off the mirror it reaches through and nearby the specimen being viewed.
Some elements do not receive light. When a light wave is reflected off a facade, it proceeds back off at an angle similar that the wave beats the surface. Using these more innovative concepts about light enacted scientists to compose new inventions.
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