Question 5:
How would dust and oil on the glass plates affect the results?
Here we apply thin film interference concept.
Question 5: How would dust and oil on the glass plates affect the results? EXPERIMENT 10 THIN FILM I...
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...
Monochromatic light of wavelength X-89.1um is shone at normal incidence through a thin film of thickness t resting atop a fully reflective surface. The film has an index of refraction of n film 1.5 What is the smallest thickness t (in ?m) the film could have to get constructive interference?
I dont understand thin film interference. Thanks in advance n-1.00 n-1.33 n=1 50 3. A thin film of thickness t and index of refraction 1.33 coats a glass with index of refraction 1.50 as shown above. Which of the following thicknesses t will not reflect light with wavelength 640 nm in air? (A) 160 nm (8) 240 nm (C) 360 nm (D) 480 nm 4. Lenses in fine quality cameras are coated to reduce the reflection from the lenses. If...
A thin film, with a thickness of 277.1 nm and with air on both sides, is illuminated with a beam of white light. The beam is perpendicular to the film and consists of the full range of wavelengths for the visible spectrum. In the light reflected by the film, light with a wavelength of 632.3 nm undergoes fully constructive interference. At what wavelength does the reflected light undergo fully destructive interference? (Hint: You must make a reasonable assumption about the...
The default setting is a thin film of glass(n = 1.5) with air (n = 1)on both sides.The starting wavelength is 652 nm and the starting thickness is 544 nm. Use these starting values for this next set of questions. 1. Is there a phase shift on the front (left) interface? On the back (right) interface in the simulation?Justify why there is/isn’t a phase shift at each interface. 2. How does the wavelength in the film (glass) compare to the...
The surface of a flat piece of glass is covered by a thin plastic that has thickness 180 nm. There is air above the plastic film. The refractive index of the glass is 1.40 and the refractive index of the plastic film is 1.80. Light of wavelength lambda_air in air shines at normal incidence on the plastic film. What is the largest value of lambda_air for which there will be constructive interference between the light reflected at the top and...
The answer is C, but how? Object Lens Point A near f ar a. Between the object and the near focal point. Between the near focal point and point A. c. Between point A and the lens. d. Between lens and the far focal point. rFurther from the lens than the far focal point. 8. Three experiments involving thin soap film (in air) are shown below. Which of these three experiments will produce constructive interference as seen by the observer...
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...
Thin film examples Suppose the two glass plates in the figure are two microscope slides 10 cm long. They are in contact at one end and are separated by a piece of paper 0.020 mm thick at the other end. What is the spacing of the interference fringes seen by reflection? Is the fringe at the line of contact bright or dark? Assume monochromatic light with λ-500 nm. λο 500 nm h - 0.020 mm 1 10.0 cm
I I know that the thickness = lambda/(2nsin 30) BUT why? I've also attached some notes I have! (Please explain using diagram and words for me to rate the answer) We were unable to transcribe this imageThin-Film Interference When light is incident on a thin transparent film, the light waves reflected from the front and back surfaces interfere. For near-normal incidence, the wavelength con ditions for maximum and minimum intensity of the light reflected from a film in air are...