Wave reflection refraction and diffraction12/17/2023 Ptolemy measured the angle that a beam of light hits a boundary, the angle of incidence, and the angle at which it leaves, the angle of refraction, through different mediums. The most amount of diffraction happens when the wavelength is a similar size to the gap. Refraction occurs when light hits the surface of water or travels through the atmosphere, and it’s atmospheric refraction that causes the stars to ‘twinkle’. (a picture would help to explain this)ĭiffraction: Waves spread out as they enter an aperture (gap). Waves undergoing a change in speed and direction as they pass from one medium to another are demonstrating refraction. The law of reflection states that the angle of incidence equals the angle of reflection. As it slows down it changes direction, meaning that the angle that it is travelling at changes - the angle becomes closer to the normal. In this experiment you will investigate a number of wave properties, including reflection, refraction and diffraction. Refraction: When light travels from air into another material (such as glass) at any angle other than normal (perpendicular), it slows down. This video summarises the properties of waves, i.e., reflection, refraction. Remember that in reflection the angle of incidence (this is the angle that the initial wave makes from the normal), is the same as the angle of reflection (the angle that the reflected wave makes from the normal). Wave properties - reflection, refraction, diffraction and polarisation. Reflection: This is when a wave hits a surface (e.g light hitting a mirror) and is bounced back. These properties of wave motion are important because they explain how waves move. On the diagram it is useful to mark on a line for 'normal', this is a straight line that is perpendicular (makes a 90 degree angle) with a surface. Both electromagnetic and physical waves reflect, refract and diffract energy. It can also be helpful to draw diagrams of each to help you to remember the difference. A wave entering a medium at an angle will. Refraction occurs when a wave passes through a medium with a different density, causing it to. Reflection, Refraction, and Diffraction Refraction occurs when a wave crosses a boundary from one medium to another. These are all properties of waves and their definitions are useful to remember for exams. Reflection occurs when a wave hits a surface and bounces back.
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