Oa = 55° а na (water)= 1.33 b No (plexiglass)=1.49

1. Which law gives the relationship between refractive index of the dielectric? a) Law of reflection b) Law of refraction (Snell's Law) c) Millman's Law d) Huygen's Law 2. Light incident on fibers of angles_ the fiber. a) Less than b) Greater than c) Equal to d) Less than and equal to 3. The ratio of speed of light in air to the speed of light in another medium is called as a) Speed factor b) Dielectric constant c) Reflection index d) Refraction index the acceptance angle do not propagate into 4.When A is the optical wavelength in vacuum, k is given by k=20/A. What does k stand for in the above equation? a) Phase propagation constant b) Dielectric constant c) Boltzmann's constant d) Free-space constant 5.Optical fibers suffer radiation losses at bends or curves on their paths. a) True b) False 6.The lower energy level contains more atoms than upper level under the conditions of a) Isothermal packaging b) Population inversion c) Thermal equilibrium d) Pumping

QUESTION 12 A tank containing methanol has walls 2.50 cm thick made of glass of refractive index 1.55. Light from the outside air strikes the glass at 42.30 with the normal to the glass. Find the angle the light makes with the normal in the methanol. Methanol has a the refractive index of 1.329. Attach File Browse Local Files Browse Content Collection

2. If light passes through a piece of tinted glass, 35% is absorbed. Then, it passes through second piece of tinted glass, another 35% is absorbed. So what is the final percentage that passes through both, compared to original 100%? a. 30%, b. 65%, c. 42.3%, d. 22.8%