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A parallel beam of light of wavelength 5890A$^{\circ}$ is incident on a glass plate
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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A glass material A with which an optical fibre is made has a refractive index of 1.55. this material is clad with another material whose refractive index is 1.51.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Derive the formula for numerical aperture of step index fibre and give its physical significance. The N.A. of an optical fibre is 0.5 and core refractive index is 1.54.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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With neat diagram explain the concept of total internal reflection (TIR).
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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What is the numerical aperture? Explain the use of optical fibre in temperature sensor.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Calculate the V number of an optical fibre having numerical aperture 0.25 and core diameter 20 m, if its operating wavelength is 1.55 $\mu$m.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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A fibre cable has an acceptance angle of 30$^{\circ}$ and core index of refractive index 1.4. Calculate the refractive index of cladding.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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The core diameter of multimode step index fibre is 50$\mu$m. The numerical aperture is 0.25. Calculate the number of guided modes at an operating wavelength of 0.75$\mu$m?
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Differentiate between step index and graded index fibre.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Explain the concept of electrostatic focusing in electron optics.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Differentiate between spontaneous and stimulated emission.
advanced engineering physics updated 5.9 years ago by teamques10 ★ 70k
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What is difference between photography and holography? Explain holography technique to obtain 3-D image of an object.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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What is holography? Differentiate between holography and photography.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Explain construction and working of Nd:YAG laser.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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What is pumping in Laser? Give the types of pumping.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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What is population inversion? Explain its significance in the operation of LASER. Why is it called state of negative temperature?
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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With a neat energy level diagram describe the construction and working of He-Ne laser. What are its merits and demerits ? OR Explain construction and working of He:Ne laser with neat label diagram.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Explain the construction and reconstruction of hologram with neat diagram.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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With the help of a proper diagram and necessary expression, explain how Newtons ring experiment is useful to determine the radius of curvature of a plano convex lens.
advanced engineering physics updated 5.9 years ago by teamques10 ★ 70k
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A Newton's rings set up is used with a source emitting two wavelength $\lambda_{1}$=6000A$^{\circ}$ and $\lambda_{2}$=4500A$^{\circ}$.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Derive the condition for absent spectra in grating.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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With the help of proper diagram and necessary expression, explain how Newton`s ring experiment is useful to determine the radius of curvature of a plano-convex lens.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Explain Newton's ring experiment and show that diameters of n th dark rings are proportional to square root of natural numbers.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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(Duplicate) A wedge shaped air film having an angle of 40 seconds is illuminated by monochromatic light and fringes are observed vertically through a microscope.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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Discuss the Fraunhofer diffraction at single slit and obtain the condition for minima.
advanced engineering physics updated 5.9 years ago by ddigantarroy • 0
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