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General
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Question
In the figure shown in YDSE, a parallel beam of light is incident on the slit from a medium of refractive index n1 The wavelength of light in this medium is l1 A transparent slab of thickness ‘t’ and refractive index n3 is put infront of one slit. The medium between the screen and the plane of the slits is n2 The phase difference between the light waves reaching point ‘O’ (symmetrical, relative to the slits) is :
The correct answer is:
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In YDSE, the source placed symmetrically with respect to the slit is now moved parallel to the plane of the slits so that it is closer to the upper slit, as shown. Then,
In YDSE, the source placed symmetrically with respect to the slit is now moved parallel to the plane of the slits so that it is closer to the upper slit, as shown. Then,
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A parallel beam of light 500nm is incident at an angle 30° with the normal to the slit plane in a young's double slit experiment. The intensity due to each slit is Io. Point O is equidistant from S1 and S2 . The distance between slits is 1mm.
A parallel beam of light 500nm is incident at an angle 30° with the normal to the slit plane in a young's double slit experiment. The intensity due to each slit is Io. Point O is equidistant from S1 and S2 . The distance between slits is 1mm.
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In the figure shown if a parallel beam of white light is incident on the plane of the slits then the distance of the white spot on the screen from O is [Assume d << D, 
<< d]
In the figure shown if a parallel beam of white light is incident on the plane of the slits then the distance of the white spot on the screen from O is [Assume d << D, << d]
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Two slits are separated by 0.3 mm. A beam of 500 nm light strikes the slits producing an interference pattern. The number of maxima observed in the angular range – 30° < 
< 30°.
Two slits are separated by 0.3 mm. A beam of 500 nm light strikes the slits producing an interference pattern. The number of maxima observed in the angular range – 30° < < 30°.
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A monochromatic light source of wavelength is placed at S. Three slits S1 , S2 and S3 are equidistant from the source S and the point P on the screen. S1P – S2P = /6 and S1P – S3P = 2/3. If I be the intensity at P when only one slit is open, the intensity at P when all the three slits are open is
A monochromatic light source of wavelength is placed at S. Three slits S1 , S2 and S3 are equidistant from the source S and the point P on the screen. S1P – S2P = /6 and S1P – S3P = 2/3. If I be the intensity at P when only one slit is open, the intensity at P when all the three slits are open is
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In a double slit experiment, the separation between the slits is d =0.25 cm and the distance of the screen D = 100 cm from the slits. If the wavelength of light used is = 6000 
and I0 is the intensity of the central bright fringe, the intensity at a distance x= 4×10–5m from the central maximum is
In a double slit experiment, the separation between the slits is d =0.25 cm and the distance of the screen D = 100 cm from the slits. If the wavelength of light used is = 6000 and I0 is the intensity of the central bright fringe, the intensity at a distance x= 4×10–5m from the central maximum is
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In a Young's Double slit experiment, first maxima is observed at a fixed point P on the screen. Now the screen is continuously moved away from the plane of slits. The ratio of intensity at point P to the intensity at point O (centre of the screen)
In a Young's Double slit experiment, first maxima is observed at a fixed point P on the screen. Now the screen is continuously moved away from the plane of slits. The ratio of intensity at point P to the intensity at point O (centre of the screen)
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Light of wavelength 520 nm passing through a double slit, produces interference pattern of relative intensity versus deflection angle as shown in the figure. The separation d between the slits is
Light of wavelength 520 nm passing through a double slit, produces interference pattern of relative intensity versus deflection angle as shown in the figure. The separation d between the slits is
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A student is asked to measure the wavelength of monochromatic light. He sets up the apparatus sketched below. S1 , S2 , S3 are narrow parallel slits, L is a sodium lamp and M is a microscope eyepiece. The student fails to observe interference fringes. Your first advice to him will be
A student is asked to measure the wavelength of monochromatic light. He sets up the apparatus sketched below. S1 , S2 , S3 are narrow parallel slits, L is a sodium lamp and M is a microscope eyepiece. The student fails to observe interference fringes. Your first advice to him will be
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Two identical narrow slits S1 and S2 are illuminated by light of wavelength from a point source P. If, as shown in the diagram above the light is then allowed to fall on a screen, and if n is a positive integer, the condition for destructive interference at Q is that
Two identical narrow slits S1 and S2 are illuminated by light of wavelength from a point source P. If, as shown in the diagram above the light is then allowed to fall on a screen, and if n is a positive integer, the condition for destructive interference at Q is that
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Two coherent narrow slits emitting light of wavelength in the same phase are placed parallel to each other at a small separation of 3. The light is collected on a screen S which is placed at a distance D (>>) from the slits. The smallest distance x such that the P is a maxima
Two coherent narrow slits emitting light of wavelength in the same phase are placed parallel to each other at a small separation of 3. The light is collected on a screen S which is placed at a distance D (>>) from the slits. The smallest distance x such that the P is a maxima
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Two point source separated by d = 5 mm emit light of wavelength = 2 
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Two point source separated by d = 5 mm emit light of wavelength = 2 in phase. A circular wire of radius 20 mm is placed around the source as shown in figure.
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Figure shown plane waves refracted for air to water using Huygen's principle a, b, c, d, e are lengths on the diagram. The refractive index of water wrt air is the ratio.
Figure shown plane waves refracted for air to water using Huygen's principle a, b, c, d, e are lengths on the diagram. The refractive index of water wrt air is the ratio.
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Two point monochromatic and coherent sources of light of wavelength l are placed on the dotted line in front of an large screen. The source emit waves in phase with each other. The distance between S1 and S2 is 'd' while their distance from the screen is much larger. Then,
1) 
If d = 7/2, O will be a minima
2) If d = 4.3, there will be a total of 8 minima on y axis.
3) If d = 7, O will be a maxima.
4) If d =, there will be only one maxima on the screen.
Which is the set of correct statement :
Two point monochromatic and coherent sources of light of wavelength l are placed on the dotted line in front of an large screen. The source emit waves in phase with each other. The distance between S1 and S2 is 'd' while their distance from the screen is much larger. Then,
1) If d = 7/2, O will be a minima
2) If d = 4.3, there will be a total of 8 minima on y axis.
3) If d = 7, O will be a maxima.
4) If d =, there will be only one maxima on the screen.
Which is the set of correct statement :
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Figure, shows wave fronts in still water, moving in the direction of the arrow towards the interface PQ between a shallow region and a deep(denser) region. Which of the lines shown may represent one of the wave fronts in the deep region?
Figure, shows wave fronts in still water, moving in the direction of the arrow towards the interface PQ between a shallow region and a deep(denser) region. Which of the lines shown may represent one of the wave fronts in the deep region?
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