Two coherent sources have intensity in the ratio of 1001. Ratio of (intensity)max/(intensity)min is: 
1. 1100
2. 110
3.101
4. 32

Subtopic:  Superposition Principle |
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If two waves represented by y1=4sinωt and y2=3sinωt+π3 interfere at a point, the amplitude of the resulting wave will be about 

(1) 7

(2) 6

(3) 5

(4) 3.5

Subtopic:  Superposition Principle |
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Two coherent sources of intensities, I1 and I2 produce an interference pattern. The maximum intensity in the interference pattern will be 

(1) I1 + I2

(2) I12+I22

(3) (I1 + I2)2

(4) (I1+I2)2

Subtopic:  Superposition Principle |
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Two beams of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the beams is π2 at point A and π at point B. Then the difference between the resultant intensities at A and B is 

(1) 2I

(2) 4I

(3) 5I

(4) 7I

Subtopic:  Superposition Principle |
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If an interference pattern has maximum and minimum intensities in a 36 : 1 ratio, then what will be the ratio of their amplitudes?

1. 5 : 7

2. 7 : 4

3. 4 : 7

4. 7 : 5

Subtopic:  Superposition Principle |
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In Young's double slit experiment, if the slit widths are in the ratio 1 : 9, then the ratio of the intensity at minima to that at maxima will be 

(1) 1

(2) 1/9

(3) 1/4

(4) 1/3

Subtopic:  Young's Double Slit Experiment |
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In a certain double slit experimental arrangement interference fringes of width 1.0 mm each are observed when light of wavelength 5000 Å is used. Keeping the set up unaltered, if the source is replaced by another source of wavelength 6000 Å, the fringe width will be 

(1) 0.5 mm

(2) 1.0 mm

(3) 1.2 mm

(4) 1.5 mm

Subtopic:  Young's Double Slit Experiment |
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Two coherent light sources S1 and S2 (λ= 6000 Å) are 1mm apart from each other. The screen is placed at a distance of 25 cm from the sources. The width of the fringes on the screen should be 

(1) 0.015 cm

(2) 0.025 cm

(3) 0.010 cm

(4) 0.030 cm

Subtopic:  Young's Double Slit Experiment |
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The figure shows a double slit experiment P and Q are the slits. The path lengths PX and QX are nλ and (n + 2) λ respectively, where n is a whole number and λ is the wavelength. Taking the central fringe as zero, what is formed at X

(1) First bright

(2) First dark

(3) Second bright

(4) Second dark

Subtopic:  Young's Double Slit Experiment |
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The Young's experiment is performed with the lights of blue (λ = 4360 Å) and green colour (λ = 5460 Å), If the distance of the 4th fringe from the centre is x, then 

(1) x (Blue) = x (Green)

(2) x (Blue) > x (Green)

(3) x (Blue) < x (Green)

(4) x(Blue)x(Green)=54604360

Subtopic:  Young's Double Slit Experiment |
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