A possible means for making an airpolane invisible to radar is
to coat the plan with an anti-reflective polymer. The radar waves
have a wavelength of 4.23 cm and the index of refraction of the
polymer is 1.64. What is the minimum thickness required to make the
coating? Assume that the plane is made of metal, so electromagnetic
waves will have a phase change upon
relfections from the plane's surface. Answer in units of cm
A possible means for making an airpolane invisible to radar is to coat the plan with...
(a) A possible means for making an airplane invisible to radar is to coat the plane with an antireflective polymer. If radar waves have a wavelength of 3.08 cm and the index of refraction of the polymer is n = 1.80, how thick (in cm) would you make the coating? (Assume that the index of refraction of the plane is higher than that of the coating. Also assume that the radar waves are normal to the surface of the coating....
My question is related to Optics- Interference from thin films: If we wish to coat flat glass [ index of refraction (n)=1.50] with a transparent material (n =1.25) so that reflection of light at wavelength 600 nm is eliminated by interference.What minimum thickness can the coating have to do this? I know that the waves will experience a phase change of pi rad or (0.5 wavelength) since the first medium has a small index of refraction. How does this connect...
the formula for reflected light form thin film layer 2 m m 0,1,2..where t is the film thickness the wavelength of the light and n is the index of refraction, can be used to determine a) constructive interference only b) b) destructive interference c) c) both destructive and constructive interference. The following picture shows wave fronts of a wave propagating in the transparent materials A and B. What can you tell about the speeds V, Vs of the wave and...
Question 5:
How would dust and oil on the glass plates affect the
results?
EXPERIMENT 10 THIN FILM INTERFERENCE Light from a monochromatic source is shined downward on two glass plates that are separated at one end by a hair. Light that is reflected from the top and bottom surfaces of the wedge-shaped thin film of air undergoes interference, and a series of dark and light lines are seen. By counting the number of dark or light lines over a...
Question 6:
What percentage error would result from miscounting
the bars by one?
EXPERIMENT 10 THIN FILM INTERFERENCE Light from a monochromatic source is shined downward on two glass plates that are separated at one end by a hair. Light that is reflected from the top and bottom surfaces of the wedge-shaped thin film of air undergoes interference, and a series of dark and light lines are seen. By counting the number of dark or light lines over a known...
Note: This test contains ten questions from chapter 19 to chapter 27. For full credit, you should show all the steps of your numerical answers. No credit would be earned for just circling the right answers. Chapter 19 - Electric Potential and Electric Potential Energy 1. Two point charges are of + 7 uC and - 4 C are held at the corners of a rectangle as shown. The lengths of the sides of rectangle are 0.15 m, and 0.05...