In YDSE, two thin transparent films of mica and glass are put in the path of two waves from coherent sources S1 and S2. If their thicknesses are 3t and 2t respectively, what should be the refractive index of mica so that central maxima is found at Oμglass = 1.5?

                          

1.  1.25

2.  1.5

3.  1.75

4.  1.33

Subtopic:  Young's Double Slit Experiment |
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In Young's double-slit experiment sources of equal intensities are used. The distance between the slits is d and the wavelength of light used is λ(λ<<d). The angular separation of nearest points on either side of central maximum where intensities become half of the maximum value is:

1.  λd

2.  λ2d

3.  λ4d

4.  λ6d

Subtopic:  Young's Double Slit Experiment |
 54%
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The angular width of the principal maximum in Fraunhofer single slit diffraction is 0.1 radian. The angular width of second-order secondary maxima is

1.  0.05 radian

2.  0.1 radian

3.  0.5 radian

4.  0.25 radian

Subtopic:  Diffraction |
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The slits in a double-slit interference experiment are illuminated by a light of wavelength λ = 600 nm. A thin transparent sheet of thickness t is placed in front of one of the slits. The number of fringes shifting is plotted across the refractive index μ of the sheet as given. The value of t is

1.  2.4 μm

2.  24 μm

3.  4.8 μm

4.  48 μm

Subtopic:  Young's Double Slit Experiment |
 71%
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In Young's double-slit experiment, the distance between the slits is 1 mm. The wavelength of the light used is 600 nm. Fringe width of the interference pattern (as shown in the figure) is :

                      

1.  0.6 mm

2.  0.3 mm

3.  0.4 mm

4.  0.2 mm

Subtopic:  Young's Double Slit Experiment |
 87%
From NCERT
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Four coherent sources of intensity \(I\) are superimposed constructively at a point. The intensity at that point is:

1. \(4I\)
2. \(8I\)
3. \(16I\)
4. \(24I\)

Subtopic:  Superposition Principle |
 55%
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In Young's double-slit experiment, the intensities at the points of maxima and minima are l0 and zero respectively. Intensities of individual sources are

1.  4l0

2.  l02

3. 2l0

4.  l04

Subtopic:  Young's Double Slit Experiment |
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Two coherent light sources S1 and S2 are kept at equal distances λ from the center of the circle on the same plane of the circle as shown in the figure. In one complete revolution on the circular path, the number of maxima observed is: (λ  = wavelength of light used and 2λ<<R)

           

1.  4

2.  6

3.  8

4.  12

Subtopic:  Superposition Principle |
 55%
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The ratio of intensities in consecutive maximas in a diffraction pattern due to a single slit is

1.  1 : 49π2 : 425π2

2.  1 : 49 : 425

3.  1 : 4π2 : 9π2

4.  1: 4: 9

Subtopic:  Diffraction |
 51%
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In an interference pattern, the position of central maxima is 5 mm from a certain point P on the screen. The fringe width is 0.6 mm. The distance of the third minima from point P is

1.  3.2 mm

2.  3.3 mm

3.  3.5 mm

4.  3.8 mm

Subtopic:  Young's Double Slit Experiment |
 66%
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