A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness l and index of refraction n=1. 5. The wavelength of the laser light in vacuum is l/10 and its frequency is f. In this problem, neither the constant c nor its numerical value should appear in any of your answers.

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.