The core strand(s) of fiber optical cable always come in a pair. Why?
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The core strand(s) of fiber optical cable always come in a pair. Why?
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- Two friends are playing with hand-held radio transcelvers which have dipole antennas. If the antenna of the transmitting radio is vertical, and the antenna of the receiving radio is at an angle 0 to the vertical, what is the recelved power as a percentage of the maximum possible received power at the receiving antenna in the following cases? (a) e - 22.00 % (b) e - 47.0° % (c) e - 79.0°Explain the concept of fiber optics as a transmission medium. Discuss its advantages over traditional copper cables and its applications in high-speed data transmission.Polarizers: Three polarizers with different axes of transmission will be placed in the path of an unpolarized laser beam with an intensity of 1000 W/m². The transmission axis of polarizer A is vertical (0°), that of B is rotated 35.5° clockwise with respect to vertical, and that of C is rotated 53.3° clockwise with respect to vertical. The polarizers can be placed in any order, but the second polarizer must be 522 mm from the first, and the third must be 229 mm from the second. (a) Find the arrangement of polarizers that maximizes the transmitted intensity and compute the maximum intensity. (b) Find the arrangement of polarizers that minimizes the transmitted intensity and compute the minimum intensity.
- Why is the static dielectric constant of some materials larger than their optical dielectric constant? How doesvdielectric constant vary with frequency?An antenna behave as resonant ckt only when its length is: a) W length/2 b) W length c) W length/4 d) W length/2 or multipleAssume the helium-neon lasers commonly used in student physics laboratories have power outputs of 0.49 mW. (a) If such a laser beam is projected onto a circular spot 1.3 mm in diameter, what is its intensity? I= W m (b) Find the peak magnetic field strength. Bo= T (c) Find the peak electric field strength. E₁= V m