Question 1: (1 point) You are at the bottom of your swimming pool, shining a laser pointer upwards. What angle would you have to shine the light; relative to the surface of the water, for the light to emerge parallel to the surface (n = 1.3)? Anwer in degrees. degrees Question 2: (1 point) A beam from a laser pointer is pointed toward a glass slab (with refractive index 1.65) as shown in the figure below. The angle of incidence (from the normal) is 51 degrees, and the thickness of the glass slab is 20 mm. How much has the beam been displaced (d in mm) upon exiting the glass slab. mm. air glass air Question 3: (1 point) A beam of white light is incident on a slab of dense flint glass at an angle of incidence of 46 degrees. Flint glass, as with most materials, displays a dispersion where the refractive index is a function of the wavelength of incident light. We can often write this dispersion using the Cauchy relation n())=A+B/>2 . For the case of Flint glass, A=1.728, and B=0.01342 um2. What is the difference in angle of the refracted beam between blue light of wavelength 400 nm, and red light of wavelength 700 nm? degrees