1. An object 12.6 cm in front of a convex mirror forms an image 6.00 cm behind the mirror. What is the focal length of the mirror? 2. An object placed 25 cm from a concave mirror forms an image at 13 cm in front of the mirror. a) If the height of the object is 12 cm, what is the height of the image? b) Is the image upright or inverted? 3. What is the frequency of a 6 x 1025 joule photon? 4. The index of refraction in fused quartz is 1.4585. What is the speed of light in fused quartz? 5. The speed of light in an unknown gemstone is determined to be 1.38 x 103 m/s. If the index of refraction for cubic zirconia is 2.18 and the index of refraction for diamond is 2.42, is the unknown gemstone cubic zirconia or diamond