If the source of light used in a Young's double slit experiment is changed from red to violet,

Monjur Alahi

If the source of light used in a Young's double slit experiment is changed from red to violet,
(a) the fringes will become brighter
(b) consecutive fringes will come closer
(c) the intensity of minima will increase
(d) the central bright fringe will become a dark fringe


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

(b) consecutive fringes will come closer

EXPLANATION:   

The options (a), (c) and (d) are related to the intensity changes. Since the intensity of light incident on the slits is not changed hence there will be no change in the intensity of the fringes. These options are not true.           

The fringe width is given as w = Dλ/d.  In this experiment D and d are not changed only λ is changed. Since the violet has smaller λ than the red light, so the fringe width will decrease. Hence the consecutive fringes will come closer. Option (b) is true.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
(a) In a single slit diffraction experiment, the width of the slit is made double the original width.

(a) In a single slit diffraction experiment, if the width of the slit is made double the original width, then the size of the central diffraction band reduces to half...

1 Answers 1 views
A Young’s double slit experiment uses a monochromatic source.

(a)  Straight line fringes are formed on screen.

1 Answers 1 views
The slits in a Young's double slit experiment have equal width and the source is placed symmetrically with respect to the slits.

The correct answer is (b) IO/4 EXPLANATION:  As in the previous explanation the maximum intensity  I₀ = (√I₁ + √I₂)². Here given that I₁ = I₂ = I (say).  →I₀ = 4 I  -------...

1 Answers 1 views
If Young's double slit experiment is performed in water, (a) the fringe width will decrease

(a) the fringe width will decrease EXPLANATION:    As the wavelength of light in water will decrease, hence the fringe width will decrease because the fringe width is proportional to the wavelength.

1 Answers 1 views
A Young’s double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is.

The correct answer is (3) Straight line Note: If instead of Young's double slit experiment, young’s double hole experiment was given shape would have been hyperbola.

1 Answers 1 views
How will the angular separation and visibility of fringes in Young’s double slit experiment ,

 (i) Angular separation βθ = β/D = λ/d It is independent of D; therefore, angular separation remains unchanged if screen is moved away from the slits. But the actual separation between fringes β = λD/d  increases, so visibility...

1 Answers 1 views
In a single slit diffraction experiment, when a tiny circular obstacle is placed in the path of light from a distant source,

The waves diffracted at the edge of circular obstacle produce constructive interference at the centre of the shadow; producing a bright spot. Difference between Interference and Diffraction Interference Diffraction 1. All bright fringes are of...

1 Answers 1 views
How would the angular separation of interference fringes in Young’s double slit experiment change

Angular separation between fringes  βθ = λ/d where λ = wavelength, d = separation between coherent sources, βθ is independent of distance between the slits and screen; so angular separation (βθ) will remain unchanged.

1 Answers 1 views
In a single-slit diffraction experiment, the width of the slit is made double the original width.

In single slit diffraction experiment fringe width is β = 2λD/d If d is doubled, the width of central maxima is halved. Thus size of central maxima is reduced to half. Intensity...

1 Answers 1 views
How does the fringe width, in Young’s double-slit experiment, change when the distance of separation between the slits and screen is doubled?

The fringe width is β = λD/d If D (distance between slits and screen) is doubled, then fringe width will be doubled.

1 Answers 1 views
X