Two long plates of glass (n=1.9) are arranged with a human hair holding the ends apart at one end. This leaves a very thin wedge of air between them. We shin red light perpendicular to the surface of the top plate. (Wavelength= 700 nm) This makes bands of interference parallel to the ends of the arrangement, which are called "fringes." a) Find the thickness of the air where the 7th dark fringe occurs. b) Is there a light fringe or dark fringe where the two ends touch together?

Q: By passing a light wavelength 500 A.U. through two pinholes 0.5 mm apart, an interference pattern is…

A: Given that, the wavelength of light is λ=500A.U. Since 1AU=1.496×1011m So it is not possible, the…

Q: In the double-slit arrangement of the figure below, d = 0.150 mm, L = 115 cm, λ = 643 nm, and y =…

A: in this question we use path difference equation  for L>>>y .

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A: Part a) According to double slit pattern,…

Q: Consider a soap film that is the thinnest film that will produce a bright blue light when…

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Q: In a Young's double-slit experiment, a set of parallel slits with a separation of 0.144 mm is…

A: a) From Young's double-slit experiment, the condition for bright fringes is the path difference must…

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Q: A light source emits visible light of two wavelengths: λ = 400 nm and λ’ = 500 nm. The source is…

A: Solution:   Given Values, Wavelength 1(λ)=400 nmWavelength 2(λ')=500 nmLength (D)=1.1 mDistance…

Q: A single slit is illuminated by a monochromatic (single colour) light source. A screne is placed 5.0…

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Q: A light with wavelength λ = 580 nm falls on a pair of closely separated slits. The first dark fringe…

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Q: 1. a. If a piece of glass (n = 1.5) is coated with a transparent plastic (n = 2.0), will there be a…

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Q: Suppose a two-slit interference pattern from 605 nm orange light has its first maximum at an angle…

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A: For constructive interference, net path difference between interfering waves must be integral…

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Q: In a double-slit interference experiment, the light source is a visible laser with wavelength…

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Q: 450 nm light is incident on two parallel glass plates (n=1.5) with air between them. A) What minimum…

A: The wavelength of incidence light is 450 nm

Q: A small insect is placed between a 5.0 cm long air wedge formed by two pieces of glass. 650 nm…

A: Wavelength=650 nm  Number of bright fringes=88

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.