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Experiment 1: Reflection from a Plane Mirror, Experiment 2: Refraction from a Rectangular Glass Block, https://keystagewiki.com/index.php?title=GCSE_Physics_Required_Practical:_Investigating_Reflection_and_Refraction_of_Light&oldid=14718, Repeat this procedure for a number of different. RESULT 5 Draw a normal at the entry point, measure the angle of incidence (i) and angle of refraction (r ) using a protractor. Refraction occurs when light travels from one medium to another (ie. Also, the measured data points for the index of refraction agree well Refraction is the bending of light as it passes from one transparent medium into another 1 . You'll get the best results with a clear, glass container for this experiment. This effect is called refraction. Luckily, it's not an issue with your goggles, but rather an optical illusion created by the i… Join the crosses to show the paths of the light rays. Water. Use the link below to share a full-text version of this article with your friends and colleagues. PHYSICS - Refractive Index of Glass Block Experiment - YouTube A pair of diagrams of the apparatus used to investigate the refraction of light. EXPERIMENT-01 REFRACTION THROUGH GLASS SLAB AIM: To trace the course of different rays of light through a rectangular glass slab at different angles of incidence, measure the angle of incidence, refraction and verify Snell`s law. Place a rectangular glass block in the centre of a piece of paper and draw a pencil line around the outside. Draw a perpendicular line at the point where a ray enters or leaves the acrylic block. 6 Repeat for a range of angles of incidence. Use a protractor to draw a second line at right angles to this line. This is the, The angle between the normal and the incident ray is called the. - At the point where the ray entered the block, draw the normal at 90º to the edge of where the block was. It's actually much further away than you thought. Blue Planet Lecture Notes Chapters 1-4 Experiment 7.1 & 7.2: Induced EMF: Magnet Passes through a Solenoid & Transformers Lab 1 Electric Field and Electric Potential Lab 3: Resistors in Series and Parallel Connections Part 2 Lab 8.1 & 8.2: Series LCR Resonance & Phase Angle versus Frequency Lab 9 Reflection, Refraction, and Total Internal Reflection CBSE X Physics Light - Reflection and Refraction. Our tips from experts and exam survivors will help you through. 4 Remove the block, connect the entry and exit points to show the path of light inside the block. This bending by refraction … ... long thin thread of glass called the core surrounded by an outer shell of a material with a ... of refraction in the cladding ensures that light will always strike the fiber side at an angle Repeat steps 2 - 7 for a rectangular glass block. APPARATUS: Drawing board, sheet of paper, board pins, rectangular glass slab. Results Remove the glass block. From the edges, your friends toss in their dive sticks, and it's a race to see who can gather the most in the least amount of time. Refraction is the bending of light. The Bending Pencil Experiment: Light Refraction. At a boundary, waves are reflected, refracted, or absorbed. What could be the problem? Sign in, choose your GCSE subjects and see content that's tailored for you. Draw the incident and emergent paths of the laser on the paper. Step 1: Fill a drinking glass or glass jar with water. A semicircular glass block is placed at the centre of a circle marked, on a white paper, with angles as shown. Ensure environment is clear of potential trip hazards before lowering lights, Reflection, refraction, and sound waves - OCR Gateway, Properties, uses and hazards of electromagnetic waves - OCR Gateway, Home Economics: Food and Nutrition (CCEA). Also measure the lateral displacement. This page was last edited on 13 April 2019, at 11:34. Experiment #1: Refraction, Reflection, and Ray Tracing Carl Adams September 9, 2011 1 Purpose In the first part of this lab, you will verify Snell’s law of refraction and use it to measure the index of refraction of a glass block. Shareable Link. 8. Place a 30 centimetre (cm) ruler near the middle of a piece of plain A3 paper. The refractive index (n) for any medium with respect to air is equal to the ratio of the speed of light in air (c ) to the speed of light in the medium(n=c/v). show the light beam entering the acrylic block, traveling through the acrylic block, and emerging from the acrylic block. . Method. Set up a ray box, slit and lens so that a narrow ray of light What do the results show instead? Now try to think of a word that still makes sense if you put it behind the glass. The transmitted light rays bend by an amount that depends on the two speeds and on the angle of incidence θ 1. 4. Instructions. Waves, such as ultrasound, can be used in medicine and other industries. Glass. 2. Step 2: Hold the tip of the pencil while inserting it into the water Investigation of refraction of light through a glass block. Place the glass block in the middle of the A4 piece of paper so that its sides are parallel to each of the sides of the paper and draw around the block with a … Draw arrows on one piece of of card or paper. Draw a straight line parallel to its longer sides. Place the paper behind the glass and watch as the arrow points the other way. Table 1 Refraction by a glass block; angles of incidence and refraction to the nearest degree angle of incidence i in degrees angle of refraction r in degrees 30 19 35 22 40 25 45 27 50 30 Table 2 Refraction by a glass block; angles of incidence and refraction to the nearest degree. Transparent glass or bottle; Water; Some drawings (or pencil and paper) Instructions for Light bending: For step-by-step instructions on how to conduct this experiment watch the video on the beginning of the article or continue reading… Draw some images you would like to test; Pour water into a glass is produced. Remove the glass block. 3. However, when you jump in, you notice you've miscalculated the placement of one of the dive sticks. I found with the calipers that the thickness of the glass block does not vary much from place-to-place, consistent with a perfect rectangle. Compare the angle of incidence with the angle of refraction for each block. Materials for Light Refraction Experiment. Remove the block. The student repeated this procedure two more times. B where it leaves the glass block. Some of the aberrations are caused by the imperfection in the glass production. Join BA and extend to C. 5. - Take away the glass block, draw the refracted ray (by joining up the incident and emergent rays). Measure the angle of incidence and angle of refraction for each block. Using a pencil on the paper, mark the path of: the ray that leaves the block with two crosses - one near the block and the other further away. Draw up a table as shown. Measure the angle of incidence and angle of refraction for each block. Remove the block. - Use a protractor to measure the angle if incidence (i) and the angle of refraction (r). 7. Measure the angles of incidence (the angle in the air) and refraction (the angle in the acrylic block). ), a portion of the light is reflected and a portion is transmitted. 4. Read about our approach to external linking. Aim a laser at the glass block so that it emerges on the opposite site. • Glass block • Protractor Procedure 1. We used a mason jar since all of our drinking glasses have an etched design in them. This bending of light rays is called refraction and it is our focus in lab today. Place a rectangular glass block in the centre of a piece of paper and draw a pencil line around the outside. Remove the glass block and join the points of … Lab 9 - Reflection, Refraction and Total Internal Reflection The experiment consists of a single thin bundle of light rays exiting a light box. A single ray from a ray box is incident at the centre of the semicircular glass block from its flat edge at an angle of incidence, i = 15 0. The answer is it is the ratio of refractive index of of glass with respect to air to the refractive index of water with respect to air =( 3/2) divided by( 4/3) = 1.125 To investigate the refraction of light through a glass block. Use the ray box to shine a ray of light at the point where the normal meets the block. The aim is to see a clear ray leaving the opposite face of the block. Investigate the reflection and refraction of light. after tracing the path of a ray of light passing through a rectangular glass slab for 4 different values of the angle of incidence , a student reported his observations. •Draw refraction diagrams •Describe an experiment to investigate the refraction of light using a rectangular and a semicircular glass block and a triangular prism •Know how waves diffract Key words •Angle of refraction •Refraction •Total internal reflection •Critical angle •Dispersion •Diffraction Place a glass block on a sheet of paper and draw its outline. Fill the glass almost to the top. But there is more to it. Use the protractor to draw a normal approximately 1/3 of the way along the longest side. NOTE: remember to measure from the normal line Use a ray box and a slit to allow a single beam of light to be incident on the surface of the glass block at an angle less than 90°. The steps are the same as you followed in the previous experiment. During the experiment, the light traveled from the image through the air, then through the glass cup into the water, and finally out of the glass cup and into the air once more before it reached our eyes. 4. Italicised data are from Table 1. angle of incidence i in degrees angle of refraction r in degrees The angle Of refraction, r is measured and recorded in Table. Picture playing a diving game in the pool. Label this line with an ‘N’ for ‘normal’. In the second part of the lab, you will be verifying the law of reflection. Paper or card. Best reviews of Refraction In A Glass Block Results And Rochester Glass Block Ratings You can order Refraction In A Glass Block Results And Rochester Glass Bloc 6. Join the crosses to show the paths of the light rays. If the glass block is not perfectly rectangular, then Equation 4 is not exact. Repeat for different values of i. Refraction of Light PART I This laboratory was designed to investigate the behaviour of light as it travels through a less dense into a denser medium. air to water, water to air). With the normal near the middle of the block, carefully draw around the block without moving it. This experiment will require you to follow the steps below 5 times (once for each piece of A4 paper). A student carried out an experiment to verify Snell’s law of refraction by measuring the angle of incidence i and the angle of refraction r for a ray of light entering a glass block. 3 Mark the path of the ray emerging from the block, draw ray with a ruler. Learn more. Materials Ray Box with comb Semicircular plastic block Procedure Placed the semicircular plastic block on the centre of a blank sheet of paper. is different (e.g., air→glass, glass→air, air→water, etc. Note the angle of refraction r. 6. Repeat steps 2 - 7 for a rectangular glass block. Traced its outline and indicated the centre of the flat side. 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