A light source that produces parallel light rays is referred to as a A/ source.
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- As light travels in an absorbing medium, the rate of decrease in intensity is proportional to the intensity at that point. The intensity as a function of distance traveled in the medium is then O an exponential function of distance. O a sine or cosine function of distance. O proportional to the distance. O proportional to 1/distance.An argon gas laser produces a cylindrical beam of light having a cross sectional area A = 4 x 10-6 m². The average power of the beam is P. It is found that the average energy stored in 3 m length of the beam is 30 nJ. What is P? (1 nj = 10-9 J) Hig 30 nW 3 W 6 WVertically polarized light of intensity lo is incident on a polarizer whose transmission axis is at an angle of 70° with the vertical. If the intensity of the transmitted light is measured to be 0.34W/m², the intensity lo of the incident light is O 1.71 W/m2 O 0.99 W/m² O 0.43 W/m2 O 2.91 W/m²
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