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Physics-

General

Easy

Question

Certain plane wavefronts are shown in figure. The refractive index of medium is

2
4
1.5
Cannot be determined

The correct answer is: 2

$fraction numerator v subscript 1 end subscript t over denominator v subscript 2 end subscript t end fraction equals fraction numerator mu subscript 2 end subscript over denominator mu subscript 1 end subscript end fraction rightwards double arrow fraction numerator 2 over denominator 1 end fraction equals fraction numerator mu subscript 2 end subscript over denominator 1 end fraction rightwards double arrow mu subscript 2 end subscript equals 2$

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Plane wave fronts are incident on a spherical mirror as shown in the figure. The reflected wave fronts will be

Plane wave fronts are incident on a spherical mirror as shown in the figure. The reflected wave fronts will be

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Wavefronts incident on an interface between the media are shown in the figure. The refracted wavefront will be as shown in

Wavefronts incident on an interface between the media are shown in the figure. The refracted wavefront will be as shown in

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Spherical wavefronts shown in figure, strike a plane mirror. Reflected wavefront will be as shown in

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The figure shows the interference pattern obtained in a double–slit experiment using light of wavelength 600nm.

The third order bright fringe is

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The third order bright fringe is

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The optical path length followed by ray from point A to B given that laws of reflection are obeyed as shown in figure is

The optical path length followed by ray from point A to B given that laws of reflection are obeyed as shown in figure is

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The optical path length followed by ray from point A to B given that laws of refraction are obeyed as shown in figure

The optical path length followed by ray from point A to B given that laws of refraction are obeyed as shown in figure

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In the figure an arrangement of young's double slit experiment is shown. A parallel beam of light of wavelength $blank to the power of ´ end exponent lambda to the power of ´ end exponent$ (in medium $n subscript 1 end subscript$ ) is incident at an angle $blank to the power of ´ end exponent theta to the power of ´ end exponent$ as shown. Distance $S subscript 1 end subscript O equals S subscript 2 end subscript O$ . Point 'O' is the origin of the coordinate system. The medium on the left and right side of the plane of slits has refractive index $n subscript 1 end subscript$ and $n subscript 2 end subscript$ respectively. Distance between the slits is d. The distance between the screen and the plane of slits is D Using $D equals 1 m comma d equals 1 m m comma theta equals 30 to the power of ring operator end exponent comma lambda equals 0.3 m m comma n subscript 1 end subscript equals fraction numerator 4 over denominator 3 end fraction comma n subscript 2 end subscript equals fraction numerator 10 over denominator 9 end fraction comma$ answer the following

The y-coordinate of the point where the total phase difference between the interefering waves is zero, is

In the figure an arrangement of young's double slit experiment is shown. A parallel beam of light of wavelength $blank to the power of ´ end exponent lambda to the power of ´ end exponent$ (in medium $n subscript 1 end subscript$ ) is incident at an angle $blank to the power of ´ end exponent theta to the power of ´ end exponent$ as shown. Distance $S subscript 1 end subscript O equals S subscript 2 end subscript O$ . Point 'O' is the origin of the coordinate system. The medium on the left and right side of the plane of slits has refractive index $n subscript 1 end subscript$ and $n subscript 2 end subscript$ respectively. Distance between the slits is d. The distance between the screen and the plane of slits is D Using $D equals 1 m comma d equals 1 m m comma theta equals 30 to the power of ring operator end exponent comma lambda equals 0.3 m m comma n subscript 1 end subscript equals fraction numerator 4 over denominator 3 end fraction comma n subscript 2 end subscript equals fraction numerator 10 over denominator 9 end fraction comma$ answer the following

The y-coordinate of the point where the total phase difference between the interefering waves is zero, is

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Statement–1: Two point coherent sources of light S1 and S2 are placed on a line as shown. P and Q are two points on that line. If at point P maximum intensity is observed then maximum intensity should also be observed at Q

Statement–2: In the figure of statement 1, the distance |S₁ P – S₂ P| is equal to distance |S₂Q – S₁Q|.

Statement–1: Two point coherent sources of light S1 and S2 are placed on a line as shown. P and Q are two points on that line. If at point P maximum intensity is observed then maximum intensity should also be observed at Q

Statement–2: In the figure of statement 1, the distance |S₁ P – S₂ P| is equal to distance |S₂Q – S₁Q|.

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In an interfrence arrangement similar to Young's double- slit experiment, the slits $S subscript 1 end subscript & S subscript 2 end subscript$ are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of $theta$ , where $theta$ is defined as shown. Screen is at a large distance. If $I subscript 0 end subscript$ is the maximum intensity then I ( $theta$ ) for $0 less or equal than theta less or equal than 90 to the power of ring operator end exponent$ is given by:

In an interfrence arrangement similar to Young's double- slit experiment, the slits $S subscript 1 end subscript & S subscript 2 end subscript$ are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of $theta$ , where $theta$ is defined as shown. Screen is at a large distance. If $I subscript 0 end subscript$ is the maximum intensity then I ( $theta$ ) for $0 less or equal than theta less or equal than 90 to the power of ring operator end exponent$ is given by:

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In an interfrence arrangement similar to Young's double- slit experiment, the slits $S subscript 1 end subscript & S subscript 2 end subscript$ are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of $theta$ , where $theta$ is defined as shown. Screen is at a large distance. If $I subscript 0 end subscript$ is the maximum intensity then I ( $theta$ ) for $0 less or equal than theta less or equal than 90 to the power of ring operator end exponent$ is given by:

In an interfrence arrangement similar to Young's double- slit experiment, the slits $S subscript 1 end subscript & S subscript 2 end subscript$ are illuminated with coherent microwave sources, each of frequency 106 Hz. The sources are synchronized to have zero phase difference. The slits are separated by a distance d = 150.0 m and screen is at very large distance from slits. The intensity I(q) is measured as a function of $theta$ , where $theta$ is defined as shown. Screen is at a large distance. If $I subscript 0 end subscript$ is the maximum intensity then I ( $theta$ ) for $0 less or equal than theta less or equal than 90 to the power of ring operator end exponent$ is given by:

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A parallel beam of light $left parenthesis lambda equals 5000 text Å end text right parenthesis$ is incident at an angle $alpha equals 30 to the power of ring operator end exponent$ with the normal to the slit plane in a young’s double slit experiment. Assume that the intensity due to each slit at any point on the screen is $I subscript 0 end subscript$ . Point O is equidistant from $S subscript 1 end subscript & S subscript 2 end subscript$ . The distance between slits is 1mm.

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Two parallel beams of light of wavelength $lambda$ inclined to each other at angle $theta left parenthesis much less-than less than 1 right parenthesis$ are incident on a plane at near normal incidence. The fringe width will be :

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M₁ and M₂ are two plane mirrors which are kept parallel to each other as shown. There is a point 'O' on perpendicular screen just infront of 'S'. What should be the wavelength of light coming from monchromatic source 'S'. So that a maxima is formed at 'O' due to interference of reflected light from both the mirrors. [Consider only 1st reflection]. $left square bracket D greater than greater than d comma d greater than greater than lambda right square bracket$

M₁ and M₂ are two plane mirrors which are kept parallel to each other as shown. There is a point 'O' on perpendicular screen just infront of 'S'. What should be the wavelength of light coming from monchromatic source 'S'. So that a maxima is formed at 'O' due to interference of reflected light from both the mirrors. [Consider only 1st reflection]. $left square bracket D greater than greater than d comma d greater than greater than lambda right square bracket$

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An interference is observed due to two coherent sources 'A' & 'B' having phase constant zero separated by a distance 4 $lambda$ along the y - axis where $lambda$ is the wavelength of the source. A detector D is moved on the positive x - axis. The number of points on the x - axis excluding the points , $x equals 0 & x equals infinity$ sat which maximum will be observed is

An interference is observed due to two coherent sources 'A' & 'B' having phase constant zero separated by a distance 4 $lambda$ along the y - axis where $lambda$ is the wavelength of the source. A detector D is moved on the positive x - axis. The number of points on the x - axis excluding the points , $x equals 0 & x equals infinity$ sat which maximum will be observed is

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