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Can reflection result in plane polarised light if the light is incident on the interface from the side with higher refractive

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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For the same objective, find the ratio of the least separation between two points to be distinguished by a microscope for light of 5000 A o and electrons accelerated through 100V used as the illuminating

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Consider a two slit interference arrangements (Fig. ) such that the distance of the screen from the slits is half the distance between the slits. Obtain the value of D in terms of λ such that the first minima on the screen falls at a distance D from the centre

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Fig. shown a two slit arrangement with a source which emits unpolarised light. P is a polariser with axis whose direction is not given. If `I_0` is the intensity of the principal maxima when no polariser is present, calculate in the present case, the intensity of the principal maxima as well as of the first

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A small transparent slab containing material of μ = 1.5 is placed along AS2 (Fig.). What will be the distance from O of the principal maxima and of the first minima on either side of the principal maxima obtained in the absence of the glass slab.AC = CO = D, S1C = S2C = d <<

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Four identical monochromatic sources A,B,C,D as shown in the (Fig.) produce waves of the same wavelength λ and are coherent. Two receiver R1 and R2 are at great but equal distaces from B. Which of the two receivers picks up the larger

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Four identical monochromatic sources A,B,C,D as shown in the (Fig.) produce waves of the same wavelength λ and are coherent. Two receiver R1 and R2 are at great but equal distaces from B. Which of the two receivers picks up the larger signal when B is turned

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Four identical monochromatic sources A,B,C,D as shown in the (Fig.) produce waves of the same wavelength λ and are coherent. Two receiver R1 and R2 are at great but equal distaces from B. Which of the two receivers picks up the larger signal when D is turned

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Four identical monochromatic sources A,B,C,D as shown in the (Fig.) produce waves of the same wavelength λ and are coherent. Two receiver R1 and R2 are at great but equal distaces from B. Which of the two receivers can distinguish which of the sources B or D has been

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The optical properties of a medium are governed by the relative permitivity (`ε_r`) and relative permeability (`μ_r` ). The refractive index is defined as `sqrt(μ_rε_r) = n` .For ordinary material `ε_r` > 0 and `μ_r` > 0 and the positive sign is taken for the square root. In 1964, a Russian scientist V. Veselago postulated the existence of material with `ε_r` < 0 and `μ_r` < 0. Since then such ‘metamaterials’ have been produced in the laboratories and their optical properties studied. For such materials `n = -sqrt(μ εr r)` . As light enters a medium of such refractive

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The optical properties of a medium are governed by the relative permitivity (`ε_r`) and relative permeability (`μ_r` ). The refractive index is defined as `sqrt(μ_rε_r) = n` .For ordinary material `ε_r` > 0 and `μ_r` > 0 and the positive sign is taken for the square root. In 1964, a Russian scientist V. Veselago postulated the existence of material with `ε_r` < 0 and `μ_r` < 0. Since then such ‘metamaterials’ have been produced in the laboratories and their optical properties studied. For such materials `n = -sqrt(μ εr r)` . As light enters a medium of such refractive

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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To ensure almost 100 per cent transmittivity, photographic lenses are often coated with a thin layer of dielectric material. The refractive index of this material is intermediated between that of air and glass (which makes the optical element of the lens). A typically used dielectric film is MgF2 (n = 1.38). What should the thickness of the film be so that at the center of the visible speetrum (5500 A o ) there is maximum transmission.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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When coherent waves (a) same phase(b) same frequency(c) same phase difference(d) same path

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Draw a new wavefornt from the given incident

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Lighth is coming from medium 1. Some part of light is being refracted and some part is reflectedWhat is the incident wavefront_______refracted

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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What is the path difference for the two waves as given in the fig.`theta' is 'pi/20

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In the above question what is the intensity of light at P if light from `S_1` and `S_2` is same i.e. (I) units. Consider these sources are

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In Youngs double slit experiment the fring spacing can be increased by these methods. Write true or false. Correct if any statement is false.a) By decreasing distance.b) By increasing the wavelenghtc) By increasing the refractive index of the medium in which experiment is taking place (e.g. this experiment is originally done in air. This experiment can also be performed in water of higher refractive index)d) By increasing the distance between the two coherent sources.c) This experiment is not valid for other waves like Electromagnetic waves, Sound Waves

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The fringe spacing in Young's double slit experiment is 0.5mm. Wavelength of light is 500nm. What could be the screen distance for this experiment. The disatance between the two sources

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If the above experiment is repeated of interference, by replacing two sources to a single slits of width 1mm. What would be the thickness of central

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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