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Answer in brief: In Young's double-slit experiment what will we observe on the screen when white light is incident on the slits but one slit is covered with a red filter and - Physics

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प्रश्न

Answer in brief:

In Young's double-slit experiment what will we observe on the screen when white light is incident on the slits but one slit is covered with a red filter and the other with a violet filter? Give reasons for your answer.

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उत्तर

When white light is incident on the slits in Young's double-slit experiment and one of the slits is covered with a red filter, the light passing through this slit appears red. The other slit, which is covered with a violet filter, will produce violet light as emergent light. Interference fringes will be created by combining red and violet colours. If constructive interference occurs for red colour and destructive interference occurs for violet colour, fringes will be red at some points. The middle fringe will be bright, with red and violet colours mixed together.

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पाठ 7: Wave Optics - Exercises [पृष्ठ १८४]

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बालभारती Physics [English] 12 Standard HSC Maharashtra State Board
पाठ 7 Wave Optics
Exercises | Q 2.4 | पृष्ठ १८४

संबंधित प्रश्‍न

Write the important characteristic features by which the interference can be distinguished from the observed diffraction pattern.


When a drop of oil is spread on a water surface, it displays beautiful colours in daylight because of ______________ .


A long narrow horizontal slit is paced 1 mm above a horizontal plane mirror. The interference between the light coming directly from the slit and that after reflection is seen on a screen 1.0 m away from the slit. Find the fringe-width if the light used has a wavelength of 700 nm.


A long narrow horizontal slit is paced 1 mm above a horizontal plane mirror. The interference between the light coming directly from the slit and that after reflection is seen on a screen 1.0 m away from the slit. If the mirror reflects only 64% of the light energy falling on it, what will be the ratio of the maximum to the minimum intensity in the interference pattern observed on the screen?


The intensity at the central maximum (O) in a Young’s double slit experimental set-up shown in the figure is IO. If the distance OP equals one-third of the fringe width of the pattern, show that the intensity at point P, would equal `(I_0)/4`.


Answer the following question.
Describe any two characteristic features which distinguish between interference and diffraction phenomena. Derive the expression for the intensity at a point of the interference pattern in Young's double-slit experiment.


Answer in brief:

Explain what is the optical path length. How is it different from actual path length?


Describe Young's double-slit interference experiment and derive conditions for occurrence of dark and bright fringes on the screen. Define fringe width and derive a formula for it.


What are the two methods for obtaining coherent sources in the laboratory?


A double-slit arrangement produces interference fringes for sodium light (λ = 589 nm) that are 0.20° apart. What is the angular fringe separation if the entire arrangement is immersed in water (n = 1.33)?


Describe geometry of the Young’s double slit experiment with the help of a ray diagram. What is fringe width? Obtain an expression of it. Write the conditions for constructive as well as destructive interference. 


Explain constructive and destructive interference with the help of a diagram?


How does wavefront division provide coherent sources?


How do source and images behave as coherent sources?


What is a bandwidth of interference pattern?


Obtain the equation for resultant intensity due to interference of light.


Obtain the equation for bandwidth in Young’s double slit experiment.


Discuss the interference in thin films and obtain the equations for constructive and destructive interference for transmitted and reflected light.


The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern, the ratio `("I"_"max" - "I"_"min")/("I"_"max" + "I"_"min")` will be ______


The distance between the first and ninth bright fringes formed in a biprism experiment is ______.

(`lambda` = 6000 A, D = 1.0 m, d = 1.2 mm)


Two identical light waves having phase difference 'Φ' propagate in same direction. When they superpose, the intensity of the resultant wave is proportional to ______.


In a Young's double-slit experiment, the intensity at a point where the path difference is `lambda/3` (`lambda` being the wavelength of the light used) is I. If I0 denotes the maximum intensity, then `"I"/"I"_0` is equal to ______.


In Young's double slit experiment fifth dark fringe is formed opposite to one of the slits. If D is the distance between the slits and the screen and d is the separation between the slits, then the wavelength of light used is ______.


The phenomenon of interference is based on ______.


Two sources of light 0.5 mm apart are placed at a distance of 2.4 m and wavelength of light is 5000 Å. The phase difference between the two light waves interfering on the screen at a point at a distance 3 mm from central bright band is ____________.


`phi  "and"  phi_2  (phi_1 > phi_2)` are the work functions of metals A and B. When light of same wavelength is incident on A and B, the fastest emitted electrons from A are ____________ those emitted from B.


In Young's double slit experiment, for wavelength λ1 the nth bright fringe is obtained at a point P on the screen. Keeping the same setting, source of light is replaced by wavelength λ2 and now (n + 1)th bright fringe is obtained at the same point P on the screen. The value of n is ______.


What is meant by Constructive interference?


A ray of light AO in vacuum is incident on a glass slab at angle 60° and refracted at angle 30° along OB as shown in the figure. The optical path length of light ray from A to B is ______.


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