PHY 1122 Lecture 9: DGD 9 Critical angle, convex and concave lenses, mirrors
3 Apr 2017
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Document Summary
A person is sitting in a small boat in the ocean. Assume that the person"s eyes are very near the surface of the water. In the investigation of a new type of optical fiber (index of refraction n = 1. 37), a laser beam is incident on the flat end of a straight fiber in air. What is the maximum angle of incidence 1 if the beam is not to escape from the fiber: 64. 4 , 57. 0 , 69. 5 , 61. 6 , 52. 9 . An object 15 cm high is placed 15 cm in front of a convex mirror with a focal length of 10 cm. What is the image height (in cm): 2, 4, 6, 8, none of the above. The left end of a long glass rod 10. 0 cm in diameter, with an index of refraction. 1. 50 is ground and polished to a convex hemispherical surface with a radius of 5. 0 cm.
