4/10/2023 0 Comments Angle of reflection mirrorsThrow light from a torch through the opening of the comb from one side. Hold the comb perpendicular to the sheet of paper. You can use a strip of black paper for this purpose. Take a comb and close all its openings except one in the middle. Laws of Reflectionįix a white sheet of paper on a drawing board or a table. ![]() Can you tell in which direction the light falling on a surface will be reflected? Let us find out. A mirror changes the direction of light that falls on it. The light may have been emitted by the object, or may have been reflected by it.Ī polished or a shiny surface can act as a mirror. It is only when light from an object enters our eyes that we see the object. But, can you see an object in the dark? It means that eyes alone cannot see any object. Have you ever thought how we see the various objects? You may say that eyes see the objects. You are able to see the words and sentences printed on this page. We also see clouds, rainbows and birds flying in the sky. Through it we see mountains, rivers, trees, plants, chairs, people and so many other things around us. The sense of sight is one of the most important senses. of incidence is changed and record whatĪs this is a qualitative investigation you do not need open minded to what happens.The world is largely known through the senses. You now need to investigate what happens as the angle you see. a ray box so that it hits the glass block Replace the block and shine a single beam of light fromwhere the normal meets the block. Near the middle of the block’s side: this is called the normal and is used a reference line for Remove the block and draw a line at right angles to one of the long sides of the block somewhere DrawĪround it with a pencil to mark its position. Place a glass block laid down on its largest side in the middle of a sheet of A4 white paper. You are not being given any detailed instruction as to what to look for, therefore it is your ![]() This is a challenge to see what really happens rather than what you think might happen from Qualitative means to see what happens without taking any numerical measurements qualitatively investigate what happens when light passes through a It is suggested that there is a simple connection between the angle of incidence and the angle of reflection.Ģ What are the biggest sources of uncertainty in your measurements?Ģ Could you put a number to the uncertainty in the measurements?Ģ Does your data support the connection you suggested in 2 above? INTRODUCTION TO REFRACTIONĪim To have a first look at light passing through substances.ġ In this experiment you will transparent material such as glass or plastic.If theĪngle of incidence / degrees Angle of reflection / degrees You will need a protractor toġ Repeat the procedure using different angles to getangles start to get a bit difficult to read because there are too many of them then use some fresh a total of five pairs of measurements. ), and the reflected ray and normal, ( angle of reflection ). Measure the angles between the incident ray and normal, ( angle of incidence measure the angles. You will need to work out a wirror this is called the incident ray ay of accurately. irror to hit the mirror exactly where theġ Mark the positions of the light ray going to the mposition of the reflected ray. Doġ Use the ray box to send a single ray of light to the mnormal touches the mirror. ![]() line it up with your drawn line on the paper. The normal is a line drawn in all optics experiments to measure anglesġ Replace the mirror on the paper, being careful to not move the mirror again. Mirror surface on the paper with a line drawn along the reflecting side (use a pencil).ġ Remove the mirror and draw a line at right angles to the mirror approximately near the middle.įrom. Aim To introduce the idea of uncertainty, and how to deal with it in experimental measurements.ġ Experiment to investigate the angles in reflectionġ Arrange a mirror in an upright position on a piece of A4 plain paper.
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