In a real CD, the pits in the following figure are covered with a layer of...
In a real CD, the pits in the following figure are covered with a layer of plastic so that surface scratches do not spoil the pits. If the index of refraction of the plastic coating is n = 1.69, what minimum depth should a pit have to give destructive interference using light with λ = 690 nm?
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In a real CD, the pits in the following figure are covered with
a layer of...
Monochromatic light of wavelength 560 nm strikes a thin layer of soap, which has an index...
Monochromatic light of wavelength 560 nm strikes a thin layer of soap, which has an index of refraction of 1.4 and rests on a bathroom tile. (a) If the layer of soap is 700 nm thick, does constructive interference, destructive interference, or partial interference occur when the light strikes the surface close to the normal? (b) What is the minimum thickness of soap that would result in no (or minimal) reflection from the surface? (100 nm)
(17 %) Problem 3: A thin layer of oil with index of refraction no-l .47 is floating above the water. The index of refraction of water is nw 13. The index of refraction of air is na-1. A light wit...
(17 %) Problem 3: A thin layer of oil with index of refraction no-l .47 is floating above the water. The index of refraction of water is nw 13. The index of refraction of air is na-1. A light with wavelength λ = 625 nm goes in from the air to oil and water. 25% Part (a) Express the wavelength of the light in the oil, λο, in terms of λ and no. 쇼 25% Part (b) Express the minimum...
In a compact disc (CD), digital information is stored as a sequence of raised surfaces called...
In a compact disc (CD), digital information is stored as a sequence of raised surfaces called "pits" and recessed surfaces called "lands". Both pits and lands are highly reflective and are embedded in a thick plastic material with index of refraction n = 1.55. As a 780-nm wavelength (in air) laser scans across the pit-land sequence, the transition between a neighboring pit and land is sensed by monitoring the intensity of reflected laser light from the CD. At the moment...
A thin layer of oil with index of refraction no = 1.47 is floating above the...
A thin layer of oil with index of refraction no = 1.47 is floating above the water. The index of refraction of water is nw = 1.3. The index of refraction of air is na = 1. A light with wavelength 1 = 750 nm goes in from the air to oil and water. n n (a) Express the wavelength of the light in the oil. 1o, in terms of 1 and no- (b) Express the minimum thickness of the...
My question is related to Optics- Interference from thin films: If we wish to coat flat...
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...
3.) An optical fiber is covered by a layer of glass, to protect its surface. The...
3.) An optical fiber is covered by a layer of glass, to protect its surface. The index of refraction of the core is n1 = 1.8, and that of the protective layer is n2 = 1.5. The diameter of the core is d= 0.2mm. a. Calculate the critical incident angle at the interface between the core and the protective layer, at which total reflection occurs! (Give your result in degrees!) b. What is the minimal radius to which the fiber...
(a) A possible means for making an airplane invisible to radar is to coat the plane...
(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....
corrective Lenses (@) Spectacles are often coated to reduce reflection. The plastic of the lens has...
corrective Lenses
(@) Spectacles are often coated to reduce reflection. The plastic of the lens has a very thin coating of some other material with different refractive index (as shown in the figure). 11 T2 Air ni Coating TLV n2 Lens n3 Figure - cross section showing three parallel layers of material (air, coating and the lens), with a light ray incident on the coating. The ray is partially reflected at the air/coating interface; the reflected ray Ti is shown....
1) A laser beam is incident on two slits with separation d = 0.026 mm. A...
1)
A laser beam is incident on two slits with separation d
= 0.026 mm. A screen is placed L = 3.8 m
from the slits. The wavelength of the laser light is λ =
4250 Å. θ1 and θ2
are the angles to the first and second bright fringes above the
center of the screen.
a) Express sin(θ1) in terms of d
and λ: sin(θ1) = ____________
b) Express sin(θ2) in terms of d
and λ: sin(θ2) =...
Problem 2 (25 points) Figure shows Young's double-slit experiment with coherent light source wavelength of the...
Problem 2 (25 points) Figure shows Young's double-slit experiment with coherent light source wavelength of the light λ is 500 nm, the slit separation d is 025 mm and the slit-screen separi on 50 cm. Assume that θ is small enough to use the approximation sin θ tan θ (a) (15 points) Let's assume that there is a constant phase offset π (1800) between the lights after thesíts 1 and s2. What is the distance y on the screen between...
(17 %) Problem 3: A thin layer of oil with index of refraction no-l .47 is floating above the water. The index of refraction of water is nw 13. The index of refraction of air is na-1. A light with wavelength λ = 625 nm goes in from the air to oil and water. 25% Part (a) Express the wavelength of the light in the oil, λο, in terms of λ and no. 쇼 25% Part (b) Express the minimum...
In a compact disc (CD), digital information is stored as a sequence of raised surfaces called "pits" and recessed surfaces called "lands". Both pits and lands are highly reflective and are embedded in a thick plastic material with index of refraction n = 1.55. As a 780-nm wavelength (in air) laser scans across the pit-land sequence, the transition between a neighboring pit and land is sensed by monitoring the intensity of reflected laser light from the CD. At the moment...
A thin layer of oil with index of refraction no = 1.47 is floating above the water. The index of refraction of water is nw = 1.3. The index of refraction of air is na = 1. A light with wavelength 1 = 750 nm goes in from the air to oil and water. n n (a) Express the wavelength of the light in the oil. 1o, in terms of 1 and no- (b) Express the minimum thickness of the...
3.) An optical fiber is covered by a layer of glass, to protect its surface. The index of refraction of the core is n1 = 1.8, and that of the protective layer is n2 = 1.5. The diameter of the core is d= 0.2mm. a. Calculate the critical incident angle at the interface between the core and the protective layer, at which total reflection occurs! (Give your result in degrees!) b. What is the minimal radius to which the fiber...
(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....
corrective Lenses
(@) Spectacles are often coated to reduce reflection. The plastic of the lens has a very thin coating of some other material with different refractive index (as shown in the figure). 11 T2 Air ni Coating TLV n2 Lens n3 Figure - cross section showing three parallel layers of material (air, coating and the lens), with a light ray incident on the coating. The ray is partially reflected at the air/coating interface; the reflected ray Ti is shown....
1)
A laser beam is incident on two slits with separation d
= 0.026 mm. A screen is placed L = 3.8 m
from the slits. The wavelength of the laser light is λ =
4250 Å. θ1 and θ2
are the angles to the first and second bright fringes above the
center of the screen.
a) Express sin(θ1) in terms of d
and λ: sin(θ1) = ____________
b) Express sin(θ2) in terms of d
and λ: sin(θ2) =...
Problem 2 (25 points) Figure shows Young's double-slit experiment with coherent light source wavelength of the light λ is 500 nm, the slit separation d is 025 mm and the slit-screen separi on 50 cm. Assume that θ is small enough to use the approximation sin θ tan θ (a) (15 points) Let's assume that there is a constant phase offset π (1800) between the lights after thesíts 1 and s2. What is the distance y on the screen between...
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