Dr. Tillotson is showing slides to her biology class. If the slides are positioned 15.5 cm from the projector lens that has a focal length of 15 om, where should the screen be placed to produce the clearest image of the slide? O a. 0.002 cm O b. 30.5 cm O c. 7.6 cm O d. 465 cmMarlin is out on a safari. Looking through his telescope, he spots a giraffe in the distance. The telescope magnifies the image 20X. How large is the image formed by the telescope if the giraffe appears to be 1.5 cm high to the naked eye? a. 13.3 cm O b. 0.075 cm O c. 30 cm O d. 20 cmA beam of light in air strikes a piece of glass at an angle of 40 degrees. what is the index of refraction for the glass if the refracted angle is 25 degrees? O a. 1.52 O b. 0.99 O c. 1.6 O d. 0.27A jeweler must decide whether the stone in Mrs. Smigelski's ring is a rea diamond or a less precious zircon. She places the questionable diamond in a container of clear liquid which has an index of refraction of 2.15. The jewel is still visible inside the liquid. Is this gem a diamond or a zircon? Necessary Materials The index of refraction for diamond = 2.42. The index of refraction for zircon = 2.15 O a. diamond O b. zirconAlison sees a coin at the bottom of her swimming pool at an angle of 403 to the normal and she dives in to retrieve it. However, Alison doesn't like to open her eyes under the water so she must rely on her initial observation of the coin made in the air. At what angle does the light from the coin travel as it moves toward the surface? Necessary information: the index of refraction of water = 1.33 O a. 58.8" O b. 0.85" 0 6. 0.48" O d. 28.92Sherlock Holmes discovers some hairs at a crime scene. The hairs are magnified 3.0 times. He view the hairs through his magnifying glass from a distance of 6 cm. How large is the magnified image? O a. 2 cm O b. 18 cm O c. 0.5 cm O d. -6 cm