Determine the angle of reflection and the angle of refraction for seven differen

Question

Determine the angle of reflection and the angle of refraction for seven different angles of incidence stating with the incident ray along the normal. The beam should hit the flat surface at the same point. You should decide and agree within your group on the values of these values of angles of incidence. You will need to fill out a table with the best results obtained by your group. For each measurement, mark carefully and precisely the incident, the reflected and the refracted rays with two points for each. 1. The pictures show our data for an angle of incidence of 300.

Explanation / Answer

You will need the following apparatus and settings to perform this experiment

1: Laser beam/light beam
2. Protractors to measure angles
3. White sheet of paper
4. Pencils
5. Ruler

Place a white sheet of paper and draw a straight line in the middle of it horizontally
Place the base of the protractor on the line and mark the normal
With respect to this normal mark all the angles you want the light to be incident on (anticlockwise mearurement)

Now at each of these angles shine light through the protractor such that the beam of light is incident at that angle. The beam of light should pass through the upper rounded curve of the protractor.

A part of the ray will get reflected and a part of it will get refracted.

Mark the spot at which it gets reflefcted ( this will be the same side from which the ray was incident, upper side)
The refracted ray will come out from the bottom. Trace it out. FIrst mark the spots at which it comes down, basically a rough marking along the refracted ray so that you can draw a proper dark line once you switch of the beam.
Draw the dark-proper line from the same horizontal base and the same normal we used in the beginning.

Measure these angles and repeat for different angles.

Be sure not to move the protractor while the beam is incident and mark the spots carefully at which the ray is incident and refrected, Using different colour of markings for different angles. This will help you conduct the experiment in one go and you can meaure the angles later.

The incident angle should be equal to the reflected angle.

The refracted angle should follow snell's law.

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