Question 3 3 pts Three light rays, each with a wavelength of 425 nanometers, tra

Question

Question 3 3 pts Three light rays, each with a wavelength of 425 nanometers, travel through air and are eventually incident on three flat sheets made of different materials. The light rays enter their respective sheets at the same angle of incidence. The materials are Crown Glass, Acrylic, and Fused Quartz. Rank the magnitudes of the velocities (1 highest, 3 lowest) of these light rays as they propagate through each of these materials If they are all the same, select all 1's digits. 1.54 1.52 1.50 1.481 1.46 Crown glass Acrylic Fused quartz 200 300 400 500 600 700 800 nanometers Crown Glass I Choose ] Acrylic IChoose Fused Quartz I Choose ]

Explanation / Answer

As seen from the graph at 425 nanometer the index of refraction is in the following order

crown glass > acrylic > Fused quartz

speed of light in the medium is given by c / n where c is velocity of light in air.

Therefore higher the index of refraction, lower will be the speed.

Hence the magnitude of velocities will be in the order

Fused quartz > acrylic > crown glass  

Fused quartz = 1

acrylic = 2

crown glass = 3

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