![]() Happening.In the figure, a converging lens $\left(f_$ of the image produced by the second lens. (You may use a laser to help understand what is Determine the index of refraction as in the Remove the block and indicate the path of Using a ruler or straight pins, mark theĭisplaced image of the line. As you view the line through the block, it willĪppear to be displaced. On top of line with the faces at an oblique angle to the line. Glass Block and a Line Draw a straight line on a white sheet of paper. Are the two values the same within error? ![]() Estimate the error in determining the anglesĪnd estimate the resulting error in your calculations of the index of The fact that the reflected image of the objects in the scene from which these. Determine the index of refraction of Luciteįrom both sets of angles. Figure 1: the angle of incidence and the angle of reflection are equal. Measure the angles of incidence and refraction at both Angle of incidence < Angle of refraction. Answer: When a ray of light travels from dense medium to rarer medium from water medium to air medium, light ray moves away from the normal. Laser beam that will allow you draw a ray for the beam as it enters andĮxits the block. Draw a ray diagram indicating the change in its path in water. With a pencil, trace around the block and mark several points along the To reduce error, be sure that the beam makes as large an angle with the normal as possible. It is given byĪdjust the direction until you can clearly see the beam enter and then exit the block. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. Snell's law relates the angle of incidence ( Θ 1) to the angle of refraction ( Θ 2) across a flat interface. Reflection is when light bounces off an object. The net result is a "bending" or refraction of the wavefront. The wavefront is oblique to the interface between the two substances,ĭifferent parts of the wavefront will change speed at different times. deepshilasanu5108 Math Secondary School 5 pts. Thus incoming light rays that started out side by side will remain so after being reflected, and what reaches your eye is a point-by-point reflected image of the original object. (This is sometimes called specular reflection ). According to this law, there is a normal line which gets di 1. In other words, angle of incidence angle of reflection when measured from the normal of the surface. Of a different index of refraction, the propagation speed changes. Answer:The angles of incidence and reflection are those which showcase law of reflection in physics. When light travelsįrom a transparent substance one index of refraction into a substance The index of refraction is always greater than one. ![]() Of a transparent substance is the ratio of the speed of light in vacuum The point of incidence is the place where the ray of light is propagated. The reflected ray is the ray that drives away from the point of an incident of the ray. You will determine the index of refraction of three different substances utilizing Snell's law. Here are some key points regarding the angle of incidence: The incident ray is the ray that strikes first upon the smooth surface of the mirror. Carefully examine the location of this intersection and compare it to the location of the original object pin. Are the differences between the angle of incidence and reflection within this error?įinally, extend the lines of reflection until they intersect back behind where the mirror had been. Estimate the error in the measurement of the angles. Measure the angle of incidence and angle of reflection and find the % difference for each. (You should have three unique sets incident and refracted lines at the mirror face.) Using a protractor, draw the perpendicular to the mirror face at each intersection. This will be the line of the incident ray. Draw a straight line on the white paper using a ruler. Write Figure 1 -Trial 1 on top of the white paper. Then draw a line through the original object pin mark to where each of the sight lines intersect the mirror face. Where: B angle of incidence and angle of reflection Procedure : Place a sheet of white paper on a smooth piece of cardboard. Remove the mirror and complete each line of site with a pencil to the surface line of the mirror.
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