Pupils dilate and constrict in order to allow an adequate amount of light to pass through the retina. Both great or small amount of light will damage retina and vision. For example, if eyes are exposed to eyes suddenly, and pupils do not constrict, a great amount of light will pass to the retina and the vision will be damaged. Similarly, if there is no enough light and pupil do not dilate, a small amount of light will pass to the retina and, again, the vision will be damaged.
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You can word it slightly differently if you want.
Answer:
Specimen
Explanation:
Light passes through the specimen directly after leaving the condenser in a compound light microscope.
Answer:
Conduction is the word you need
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