In a thin film, if a wavelength is maximally reflected, what happens to the transmitted ray
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In a thin film, if a wavelength is maximally reflected, what happens to the transmitted ray?
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- 11. The electric and magnetic fields of an EM wave moving through free space at an instant in time are given by the expressions: N E = (80.0â + 32.0ŷ – 64.02) B = (0.200âx + 0.080ŷ + 0.290£) µT a) Show that the two fields are perpendicular to each other. (10 pts.) b) Compute the Poynting Vector (S). (10 pts.)3 Show from Eq. (42) that the normal reflectance of a single half-wave thick layer deposited on a substrate is the same as the reflectance from the uncoated substrate. (no - n,)? R = (no + n,)23. Electromagnetic waves from a radio station pass through an open window of a house. The square window has side length 0.75 m and the waves pass through perpendicular to the window's area. The electric field is measured at the window and found to be 0.02 V/m. In air, we can use the vacuum permeability = 4 x 10-7 H/m. (i) What is the magnitude of the Poynting vector, S, for the radio waves passing through the window? (ii) How much energy do the radio waves carry through the window during a 2-minute-long broadcast of BBC Radio 4's shipping forecast? [Hint: think of the units of S [units = (J/s)/m²] and Energy [units = J].
- A ray of blue light, randomly polarized, travelling in air (n=1.0) is incident on the surface of a transparent material (n = 1.6) at an angle of 45°. Calculate the ratio of intensities for reflected s- and p-polarized light, Is/Ip. (10)The ratio If/lo is maximized when polarizer X is rotated so its polarization axis is 45° different from that of polarizer A (that is, when OAx is 45°). What is this maximum intensity ratio?Does the atmosphere as a whole stop visible light from reaching the Earth? (Hint: trace gases are a verysmall piece of the atmosphere).
- PROBLEM 4: A transmitter is transmitting radio signal of 50 MHz with 100 kW output power. Find the field strength due to space wave at a distance of 100 km when the heights of transmitting and receiving antennas are 100 m and 36 m respectively. Assume that the field strength from the transmitting antenna is same as that of half wave antenna.At what angle will the microwave be completely polarized? explain ASAP?