Question

This is a short activity for verification of snell's law, where you need just a ruler, protractor and white marker. It is very simple for someone who understands Physics but still: Please only answer if you have 10 min to answer the question.

A laser beam is passed from air through a block of glass and then back into the air. The Figure 18.16 shows how to determinr the direction of the refracted ray inside the block of glass.

1.Trace figure 18.16 onto a blank piece of paper and trave all lines shown. Draw a line linking the points where the incident ray enters the glassband the emergent ray exits the glass. A white marker or chalk may be useful to do this. This is the path of the refracted ray inside the glass. Label the "incident ray" "emergent ray" "angle of incidence" "angle of refraction" and "the normal" on the diagram. Measure the angles of incidence and of refraction.

2. (a)Use your data to determine the index of refraction for crown glass, which is the type of glass these blocks are made of. (b)The accepted value for crown glass is 1.52. Calculate the percent difference compared with the accepted value using the equation Fp
(c) Discuss  wether the results of this experiment verify Snells law.

Answer 1