Questions (4 pts): 1) From your observation involving the prism, which color is

Question

Questions (4 pts): 1) From your observation involving the prism, which color is bent the most (i.e. deviated the most from the incident direction) after passing through the prism? Does this agree with your 2) For the Acrylic block, do you expect the outgoing ray to be parallel to the incoming ray? Is 3) In the experiment on total internal reflection, how does the brightness of the internally 4) Which has the larger critical angle -red light or violet light? What does this tell you about analysis above concerning the bending of red light versus blue light? this supported by your data (i.e. does 0,1 6,2) reflected ray change when the incident angle changes from less than 6, to greater than 6.? (You can now appreciate why they call it total internal reflection.) the index of refraction of red light versus violet light?

Explanation / Answer

1. from analysis of the prism, the blu colour light is bent the most after passing through the prism

This agrees with the fasct that glass has more refractive index for low wavelengths and hence more bending for blue light

2. For a block, the outgoing rays are always parallel to the incopming rays if the interfaces of the outgoing and the incvoming light are parallel

3. for angles less thant thetac, the light is not totally internally reflected and hence the brightness of the reflected light falls to bare minimal

for angles more then thetac, the brightness of the reflected beam stays fairly constant

4. red light has larger critical angle

this shows that red light will have lower refractive index in the medium as compared to bluke light which has lower critical angle and higher refractive index

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