Anti-reflective coatings on lenses use thin-film interference to eliminate the reflection of a particular color
Anti-reflective coatings on lenses use thin-film interference to eliminate the reflection of a particular color. Suppose a glass lens (ng = 1.55) is covered with a thin film (nf = 1.33) to prevent green light (λ = 527 nm) from being reflected.
Part (a) Write an expression for the minimum thickness the film can have, t.
Part (b) Calculate the minimum thickness, t, in nanometers?
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Anti-reflective coatings on lenses use thin-film interference to eliminate the reflection of a particular color
4, Thin films. (a) A film of water (n = 1.33) in air has a thickness...
4, Thin films. (a) A film of water (n = 1.33) in air has a thickness t = 320 nm. If it is illuminated with white light at normal incidence, what color will it appear to be in reflected light? (b) Lenses are often coated with thin films of transparent substances such as MgF2 (n - 1.38) to reduce the reflection from the glass surface. How thick t should the coating be to produce a minimum reflection at the center...
Camera lenses (n = 1.45) are often coated with a thin film of magnesium fluoride (n...
Camera lenses (n = 1.45) are often coated with a thin film of magnesium fluoride (n = 1.36). These non-reflective coatings use destructive interference to reduce unwanted reflections. Find the condition for destructive interference in this case, and calculate the minimum thickness required to give destructive interference for light in the middle of the visible spectrum (yellow-green light, λair = 555 nm).
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 wit...
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...
Problem 4 Glass A lens made of glass (ng 1.52) is coated with a thin film...
Problem 4 Glass A lens made of glass (ng 1.52) is coated with a thin film of MgF2 (ns- 1.38) of thickness t. Visible light is incident normally on the coated lens as in the figure MgF (a) For what minimum value tmin of t will the reflected light of wavelength 540 nm (in air) be missing? Incident light (b) What is the relation giving the other values of t that will minimize the reflected light at this wavelength? Give...
5. Camera lenses (n = 1.5) are often coated with a thin film of magnesium fluoride...
5. Camera lenses (n = 1.5) are often coated with a thin film of magnesium fluoride (n = 1.34). These non-reflective coatings use destructive interference to reduce unwanted reflections. Find the condition for destructive interference in this case, and calculate the minimum thickness required to give destructive interference for light in the middle of the visible spectrum (yellow-green light, λair = 550 nm). 6. During a boring banquet you notice that the fat swimming on top of your soup is...
Question 5: How would dust and oil on the glass plates affect the results? EXPERIMENT 10 THIN FILM I...
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...
4, Thin films. (a) A film of water (n = 1.33) in air has a thickness t = 320 nm. If it is illuminated with white light at normal incidence, what color will it appear to be in reflected light? (b) Lenses are often coated with thin films of transparent substances such as MgF2 (n - 1.38) to reduce the reflection from the glass surface. How thick t should the coating be to produce a minimum reflection at the center...
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...
Problem 4 Glass A lens made of glass (ng 1.52) is coated with a thin film of MgF2 (ns- 1.38) of thickness t. Visible light is incident normally on the coated lens as in the figure MgF (a) For what minimum value tmin of t will the reflected light of wavelength 540 nm (in air) be missing? Incident light (b) What is the relation giving the other values of t that will minimize the reflected light at this wavelength? Give...
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...
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