Light from an incandescent source transmits through a polarizer whose transmission axis makes an angle of 37.0° with respect to the vertical; i. e., the 37.0 − degree mark on the polarizer lines up with the index mark on the component carrier. The light intensity after passing through the polarizer is 71.3 ux. (a) At what angle would you need to set a second polarizer in order to have no light transmitted? (b) At what angle would you need to set the second polarizer to obtain a light intensity of 23.4 ux? Assume the polarizers are ideal.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.