PPT-Anne Obermann Part I: Seismic Refraction

PSTE 4223 Methodes sismiques 2 x 3h Overview Introduction historical outline Chapter 1 Fundamental concepts Chapter 2 Data acquisition and material Chapter 3 Data interpretation . RAY OPTICS -I Refraction of Light: Refraction is the phenomenon of change in the path of light as it travels from one medium to another (when the ray of light is incident obliquely). It can also be de Chapter :: 6. Snell’s Revenge!. Snell’s Law & Critical Refraction. Because seismic sources radiate waves in all directions. Some ray must hit interface at exactly the critical angle, . i. c. This critically oriented ray will then travel along the interface between the two layers. When light travels from one material to another it usually changes direction. The bending of light that occurs at the borderline of two materials is called . refraction. Geometrical concepts:. -incident ray. Mr. . . Dvorsky. SNC2D1. Review of last chapter. From the last chapter, we know how light behaves when it travels in space or in the air – i.e. it travels in a straight line.. When light strikes a plane mirror, the angle of incidence = the angle of reflection. . What interactions can waves undergo?. Name: ________________ Date: ___________. . 6.P.1.1 Waves: Forces and Motion. EQ: What interactions can waves undergo?. Reflection... head your notes like this!. Refraction Seth Stei Page 1/3 Seismic Waves and Earth’s interioextract from Chuck Ammon’s excellent description of seismic waves behavior.. Reection & Refraction: Air to GlasLesson 3: Beha Introduction to Seismology. 29 Mar 2017. © A.R. Lowry . 2017. Read for . Fri 29 Mar: . S&W. . 119-157 . (. §3.1–3.3). Last time: . Finished Up Normal Modes. • Normal modes have potentially infinite numbers of frequencies. ID: 8656. Session. . Title. : New development in open . source. and . academic. . seismic. software. Conveniors. : Majdański, Polkowski. . Velocity. in the . sedimentary. . layers. from post-. is the bending of light as it passes from one medium into another.. refraction. N. q. w. q. A. Note: the angle of incidence . q. A. . in air and the angle of refraction . q. A. . in water are each measured with the normal . What is refraction?. What causes refraction?. What are some examples of refraction of light that show why it is important?. Refraction of Light - Defined. Refraction of light occurs when a light wave moves from a vacuum (or a medium) into another medium (or a vacuum). When a wave changes media, its ____________ changes.. Abstract: EGU21-11139 | . ECS. Crustal structure across Himalayan Frontal Thrust (HFT) using high-resolution geophysical datasets. Shashank. . Narayan. . Verma. , . Dibakar. . Ghosal. , . Vikas. , . (G312). .. INTRODUCTION:. engineering geophysics. . can be defined as one of the . application of geophysical survey techniques to site investigations for . civil engineering. . purposes. Common investigations include: finding the depth to bedrock for foundation studies; determining the . Part 1. Seismic Waves and Interior of the Earth. The behaviour of seismic waves in the different layers of the earth provides the most authentic evidence about the composition and structure of the earth. The different types of waves, generated during the occurrence of an earthquake, are generally divided into three broad categories: . Part 2: Speed of sound, waves, and bedrock. Image credit: J. Louie, University of Nevada-Reno. Outline. Speed of sound. Waves. Bedrock. Urban and wildland environments. Importance for human activities.