Читать книгу The Physics and Technology of Diagnostic Ultrasound: A Practitioner's Guide - Robert Gill - Страница 26

1 Look for examples of refraction of light in everyday life.

2 Calculate the critical angle for the example above (where c1 = 1450 m/sec and c2 = 1600 m/sec) and make sure you get the same answer (i.e. 65°). (Hint: calculate the ratio of the two propagation speeds, then calculate the angle that has this as its sin by using your calculator's inverse sin function (sin-1); this angle will be θi.)