White light is incident on a soap film at an angle sin^-1 4/5 and the reflected light is observed with spectroscope. It is found that two consecutive dark bands correspond to wavelength 6.1×10-5 cm and 6×10-5cm. If the refractive index of the film be 4/3 ,calculate the thickness of the film.

Q: What condition must exist so that no phase change occurs at either boundary in a thin film…

A: Option (D) is the right answer

Q: The rhinestones in costume jewelry are glass with index of refraction 1.50. To make them more…

A: The refractive index of the coating material is greater than the refractive index of the base…

Q: a glass microscope lens having an index of reflection 1.45 is to be coated with magnesium fluoride…

A: Determine the wavelength of the light in the film as follows. λfilm=λnfilm=550 nm1.46=376.71 nm

Q: Analysis of an interference effect in a clear solid shows that the wavelength of light in the solid…

A:

Q: In the figure, two isotropic point sources of light (S1 and S2) are separated by distance 3.20 um…

A:

Q: A glass sheet 0.870 μm thick is suspended in air with white light incident perpendicularly on the…

A: Write a given value of this question. t=0.870μm=0.870×10-6mλ1=498.8nm=498.8×10-9mλ2=665nm=665×10-9m

Q: u wish to make an anti-reflective coating from a material with index of refraction 1.09 to put on…

A:

Q: A material having an index of refraction of 1.30 is used as an antireflective coating on a piece of…

A:

Q: Q.2 (a) Newton's rings are observed in the reflected light of wave length 5900 A. The diameter of 10…

A: Given that, The wavelength of the reflected light, λ=5900 A The diameter of the 10th ring is 0.5 cm…

Q: 6) Light from a 620 nm wavelength laser passes through a diffraction grating with 4000 lines/cm in…

A: a. Given: N=4000 lines/cm=4,00,000 lines/mβ=90°wavelength=λ=620nm=620×10-9m

Q: White light, with a uniform intensity across the visible wavelength range of 400 nm to 720 nm, is…

A: Given data   The lower visible wavelength range is λmin = 400 nm. The higher visible wavelength…

Q: An anti-glare coating is applied to minimize reflection of a certain wavelength from the glass of a…

A: For a anti glare coating, the thickness of the film is in order that destructive interference occurs…

Q: The light from a mercury lamp is incident on a water film of refractive index 1.33 and thicknesst =…

A: We need to find a relation between wavelength, refractive index and thickness for reflection of…

Q: If you look at something 40 m from you, what is the smallest length (perpendicular to your line of…

A:

Q: Plastic coatings are put in a car's glass window (n = 1.52) in order to keep the interior of cars…

A: Given:-  Plastic coatings are put in a car's glass window (n = 1.52) the index of refraction of the…

Q: Mourning doves have a small patch of iridescent feathers. The color is produced by a 330-nmthick…

A: From the condition for the constructive interference the wavelength be given as,

Q: A phase change occurs whenever light reflects off of a medium with a lower refractive index than the…

A: When light reflect off of a medium with lower refractive index than the medium that the light is…

Q: A glass sheet 0.910 um thick is suspended in air with white light incident perpendicularly on the…

A:

Q: An extremely thin sheet of glass is being inspected at the factory. Illuminated by white light at…

A: The wavelength of visible light is 452.35 nm.

Q: Two coherent light sources of intensities ratio 36:9 are employed in an interference experiment.…

A: Two coherent light sources of intensities ratio,

Q: An anti-glare coating is applied to minimize reflection of a certain wavelength from the glass of a…

A: The phenomenon of destructive interference occurs in an anti-glare coating system.  Accordingly, the…

Q: Two flat plates of glass with parallel faces are on a table, one plate on the other. Each plate is…

A:

Q: 15 fringes are displaced when thin transparent object with refractive index is 1.4 is introduced in…

A: Total fringe shift is,

Q: In a version of Young's double-slit experiment, two narrow slits in a screen are illuminated by…

A: (a) Let θ be defined as the angle of the 10th dark fringe from the central bright band. Therefore,…

Q: A soap bubble (n =1.33) is floating in air. If the thickness of the bubble wall is 115 nm, what is…

A: Given :  n = 1.33 t = 115 nm = 115 × 10-9 m

Q: The light from a mercury lamp is incident on a water film of refractive index 1.33 and thickness t =…

A:

Q: On the soap film (n=1,3), which is in the air, a normal beam of white light rays falls. At what is…

A: Solution: given that n = 1.3 wavelength = 0.65 microns

Q: An oil slick on water is 144 nm thick and illuminated by light of all wavelengths incident at a 30°…

A: As we know condition for constructive interference is,  2t  = λn2,3λn2,5λn2,....  where t is…

Q: assume that two waves of light in air, of wavelength 400 nm, are initially in phase. One travels…

A: Here, the first phase of the first wave is         And the phase of the second wave is The phase…

Q: A monochromatic light with 536nm pass through a slit that is 0.240 mm wide. In the resulting…

A:

Q: 4.2. The Fresnel reflection at a butt joint with an air gap in a multimode step index fiber is 0.46…

A: We have given The Fresnel reflection at a butt joint with an air gap in a multimode step index fiber…

Q: Interference fringes are produced using Lloyd’s mirror and a source S of wavelength λ = 606 nm as…

A:

Q: White light (consisting of wavelengths from 400 nm to 700 nm) is normally incident on a grating.…

A:

Q: 2 If light leaves a material of refractive index 1.45 and crosses an abrupt boundary into a material…

A:

Q: Mourning doves have a small batch of iridescent feathers. The color is produced by a 260-nm-thick…

A:

Q: Monochromatic light strikes a thin film normal to the surface. On either side of the thin film is…

A:

Q: White light is sent downward onto a horizontal thin film that is sandwiched between two materials.…

A:

Q: wish to make an anti-reflective coating from a material with index of refraction 1.09 to put on top…

A: We know that the formula of the thickness of the coating that will produce destructive interference…

Diffraction of light

In physics, the term diffraction is defined as the bending of light around the corners of the obstacle. As a light ray passes by an aperture, it bends around the edges or through slits, it spreads out through a narrow opening. The diffracted light will produce fringes of bright and dark or colored bands which are labeled as a diffraction pattern.