TOEFL Listening: TPO-TOEFL阅读TPO - EI8U34GC5P60_G1SN$

According to paragraph 1, what happens to the light when a specimen is being viewed with a light microscope? A. The light continues unchanged directly into the viewer's eye or onto film. B. A glass lens bends the light to form a magnified image of the specimen. C. The light is projected onto photographic film to produce a blurred image. D. The intensity of the light increases a thousand times.