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Explain the Faradays law for static electric field.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Write down Maxwells four general equation in integral form and mention importance of each equation against it.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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write continuity equations and state its significance.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Describe Cartesian and spherical coordinate system. Write down the expression to Convert Cartesian coordinate to spherical coordinate and spherical to Cartesian.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Determine the ratio of population of higher to lower energy level in an atom at RT under thermal equilibrium if the energy difference between the 2 levels corresponds to $\lambda$ = 500 nm.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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A source emits laser beam with an average power of 6 mW. Find the number of photons emitted per second by the laser if 6328 $\mathring{A}$ is the $\lambda$ of emitted light.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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A He-Ne laser operating at 115 V & 2 A has an output power of 1 mW. What is its efficiency of conversion of electrical energy to coherent light energy?
engineering physics updated 4.1 years ago by krithikkm200 • 10
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A laser can be focused on an area = square of its $\lambda$. For a He-Ne laser having $\lambda$= 6328 $\mathring{A}$ and radiating at 1 mW, find the intensity of its focused beam.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Calculate the number of photons in each pulse if the pulsed laser emits photons of $\lambda$ = 900 nm with 40 mW average power per pulse & a pulse duration of 5 ns.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Calculate the numerical aperture (NA) & hence the acceptance angle for an optical fiber given that RIs of core & cladding are 1.45 & 1.40 respectively.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Calculate RIs of core & cladding material of a fiber that has NA = 0.20 & fractional change in RI as 1%.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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An optical fiber has NA = 0.25 & cladding RI = 1.55. Determine its acceptance angle when this fiber is immersed in water having RI 1.33. Also calculate its core RI.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Calculate the cut-off parameter & the number of modes for a fiber of core diameter = 50$\mu m$, core RI = 1.50 & cladding RI = 1.48, operating at a wavelength of 1 $\mu m$.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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A soap film of RI 4/3 & thickness $1.5 \times 10^{-4}$ cm is illuminated by white light incident at an angle of $45^0$. Calculate the order of this band.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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White light illuminates a soap film of RI 1.33 making an incidence angle of $45^0$. At what minimum thickness of the film will it appear to be yellow in color in the reflected light?
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Find $\mu_{liq}$ if $\mu_{liq}>\mu_{water}.$
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Show that $\lambda = 7.228 \times 10^{-5} $cm will be strengthened in the reflected light.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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A soap film of RI 1.33 & thickness $6 \times 10^{-5}$ cm is viewed at angle of $35^0$ to normal.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Calculate the thickness of soap film of RI 1.43 if a $1^{st}$ order dark band of $\lambda = 6 \times 10^{-7}$ m is observed in the refracted light corresponding to an incidence angle of $30^0$.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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White light falls normally on a soap film of thickness $5 \times 10^{-5}$ cm & of RI 1.33. Which wavelength in the visible region will be reflected most strongly?
engineering physics updated 4.1 years ago by krithikkm200 • 10
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At what thickness of the drop will the light of $\lambda = 4800 \mathring{A}$ be strongly reflected in the $3^rd$ order?
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Fringes of equal thickness are observed in a thin glass wedge of RI = 1.52. Calculate the angle of wedge in arc-sec if for a light of $\lambda =5893 \mathring{A}$ the fringe spacing is found to be 1mm
engineering physics updated 4.1 years ago by krithikkm200 • 10
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A square piece of thin film with RI = 1.4 has a wedge shaped section so that its thickness at two opposite sides
engineering physics updated 4.1 years ago by krithikkm200 • 10
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Find the fringe width if $\lambda = 6000 \mathring{A}$.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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In the Newtons ring experiment, determine the ring number that will have double the diameter of the $40^{th}$ dark ring.
engineering physics updated 4.1 years ago by krithikkm200 • 10
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