Parallel blue and red laser rays are inside a tank of water where a bulk of Sili

Question

Parallel blue and red laser rays are inside a tank of water where a bulk of Silica(Quartz) is immersed in the water, as shown in the figure.(a) Sketch the rays as they pass through the slab, and after they have entered the water at the bottom of the slab.(b) Are the rays parallel after they exit the Silica? Explain why or why not(c) Find the speed of light of the blue and the red laser ray inside the water and theSilica.(d) Find the wavelength and the frequency of each laser in the water and in theSilica.(e) Find the angle of refraction of each laser in both the water and the silica.

Explanation / Answer

b) yes the rays will be parallel since they have same angle of incidence.although they have different angle of refraction inside the slab, they come at same angle as they entered.

c) inside water ::

refractive index of water ::

n = 1.331 for red light

so speed of red ray = speed of light in vaccum / n = 3 x 108 /1.331 = 2.254 x 108 m/s

n = 1.340 for blue light

so speed of blue ray = speed of light in vaccum / n = 3 x 108 /1.340 = 2.239 x 108 m/s

e) To solve for the angle of refraction , we need the angle of incidence for each ray. please provide that information

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