Use the protractor to draw a normal approximately 1/3 of the way along the longest side. Place the rectangular glass block on a sheet of white paper and draw around it carefully with a pencil.Set up the ray box and slit so that a narrow, bright ray of light is produced.Low voltage power pack, a 12V ray box, a single slit comb, a rectangular glass block, a sheet of white paper, a protractor, a sharp pencil. However, as the angle of incidence increases the refracted light will bend from a bigger initial angle, and so the angle of refraction will also be bigger. Light is travelling from air to glass and so is refracted towards the normal. Remember - these variables are controlled (or kept the same) because to make it a fair test, only 1 variable can be changed, which in this case is the angle of incidence. Independent Variable is the angle of incidence.ĭependent Variable is the angle of refraction.Ĭontrol Variables are the material of the block, the shape of the block and the colour of the light. observe and use a protractor to measure angles of refraction.make, measure and record the angles of incidence accurately using a protractor.In this required practical activity, it is important to: There are different ways to investigate refraction in rectangular blocks. and to use the measurements taken to plot a graph of angle of incidence against angle of refraction to show that they are related but not proportional.To demonstrate understanding that the angles of incidence and refraction are measured from a line at right angles to the glass surface known as the normal.To use ray tracing to measure the angles of incidence and refraction when light is refracted by a glass block.Mark the angle of incidence and angle of reflection on it.A guide to carrying out a practical investigating angles of incidence and refraction Draw a labelled ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror.
To determine minimum deviation for given prism by plotting graph between angle of incidence and angle of deviation.Angle of Incidence - Definition, Formula, Diagram.Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it.If the angle of reflection is 47.5°, what will be the angle of incidence? Mark the angles of 'incidence' and 'reflection' clearly on the diagram. State and explain the laws of reflection of light at a plane surface (like a plane mirror), With the help of a labelled ray-diagram.The angle of refraction will be:(a) 90° (b) smaller than the angle of incidence(c) equal to the angle of incidence (d) greater than the angle of incidence A ray of light travelling in air goes into water.The angle of refraction will be:(a) equal to the angle of incidence (b) greater than the angle of incidence(c) smaller than the angle of incidence (d) 45° A ray of light passes from glass into air.What is meant by the 'angle of incidence' and the 'angle of refraction' for a ray of light? Draw a labelled ray diagram to show the angle of incidence and the angle of refraction for a refracted ray of light.What will be the:(a) angle of incidence?(b) angle of reflection? A ray of light is incident normally on a plane mirror.The angle of reflection is equal to the angle of incidence:(a) always (b) sometimes (c) under special conditions (d) never.Angle of incidence is equal to the angle of reflection.$(a)$.Which of the following pair of angles are equal?(a) Angle of incidence and angle of refraction.(b) Angle of prism and the angle of emergence.(c) Angle of refraction and angle of deviation.(d) Angle of incidence and angle of emergence.Write the relation between the angle of incidence and the angle of refraction for a medium.What are the values of angle of incidence i and angle of reflection r for a normal incidence?.
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