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935
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Determine the radius of curvature of the lens in contact with plane glass.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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10k
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Compute the maximum radius allowed for a fiber having core RI 1.47 & cladding RI 1.46. The fiber is to support only one mode at a wavelength of 1300 nm.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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803
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The fiber is coupled to a light source of wavelength 1.5 $\mu m$. Also calculate its acceptance & critical angles.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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Transform the Cartesian coordinates (-2, 2, 3) to cylindrical coordinate system.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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1.8k
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Transform the cylindrical coordinates (3, $\pi$/3.-4) to Cartesian coordinate system.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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1.8k
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If diameters of $n^{th}$& $(n+9)^{th}$ dark rings are 2.25 & 4.5 mm respectively, calculate RI of the liquid.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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1.2k
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Find the diameter of the $5^{th}$ bright ring.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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A white light is used to study single-slit diffraction pattern. For what $\lambda$ of light does the $2^{nd}$ minimum coincide with the $3^{rd}$ minimum for 4000 $\mathring{A}$ line?
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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971
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Express the following Cartesian coordinates (2 $\sqrt{3}$, 6,-4) to spherical coordinate system
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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983
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What is the longest $\lambda $ that can be observed in the $4^{th}$ order for a grating having 6000 lines/cm?
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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What other spectral lines in the range 4000 7000 $\mathring{A}$ will coincide with the $4^{th}$ order line of 5000 $\mathring{A}$ in a grating spectrum?
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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The screen is at 2.8 cm from centre of deflecting plates. Find the input voltage required to deflect the beam by 1.5 cm.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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872
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Also find the displacement of a particle with charge twice that of an electron & mass 7344 times as large. Given: e/m = $1.76 \times 10^{11}$ C/kg.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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849
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Find the angle between the vectors $\bar{a}=3\hat{i} + 4\hat{j}$ and $\bar{b}=6\hat{i} - 3\hat{j} + 2\hat{k}$
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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860
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An electron moves in a uniform magnetic field of 0.23 $Wb/m^2$ making an angle of $45^0$ with it. Determine radius & pitch of its helical path. Assuming electron speed to be $3 \times 10^7$ m/sec.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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How many orders will be observed by grating having 4000 lines/cm, if it is illuminated by light of wavelength in the range 5000 to 7500 $\mathring{A}$?
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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White light (400 nm <$\lambda$< 700 nm) is normally incident on a grating. Show that the $2^{nd}$& $3^{rd}$ order spectra always overlap irrespective of the grating element.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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The resolving power (RP) of a diffraction grating is given by $\lambda /d\lambda$ = nN.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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45k
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In the Newtons ring experiment, determine the diameter of the $20^{th}$ ring if the diameters of the $4^{th}$& $12^{th}$ rings are 0.4 & 0.7 cm respectively.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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Find the maximum value of RP a grating 3 cm wide & having 7000 lines/cm can have if a light of $\lambda$ = 5000 $\mathring{A}$ is used.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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5.9k
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Find the minimum number of lines required in a grating of width 2 cm so that the two Na lines of 5890 & 5896 $\mathring{A}$ are just resolved in the 1st order spectra.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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A grating has 10000 lines/cm & its total width is 5 cm. Calculate for $\lambda$ = 6000$\mathring{A}$ in the 2nd order its RP & the smallest difference in $\lambda$ which can be just resolved.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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Would you expect these lines to be distinguished by the grating in the $1^{st}$ order?
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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Calculate the film thickness if the incidence angle is $Sin^{-1}(4/5)$.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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14k
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What do you mean by thin film? Explain the formation of colors in the thin film.
engineering physics updated 2.8 years ago by pedsangini276 • 4.8k
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