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Why are coherent sources required to produce interference of light?
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Why two distant flash lights do not produce interference fringes?
to produce interference pattern the sources should be coherent but two independent sources cannot produce such pattern. hence they won't produce interference fringes
How do you produce two coherent sources of light?
two coherent light sources are produced by splitting a single light source
Why should the two coherent sources be monochromatic?
If they are not, the interference patterns become much more complicated, and vary over time.
What are coherent sources and conditions for it?
Coherent sources are sources of light with a constant phase difference. The conditions for this are that there is a constant phase difference and that the light is of the same wavelength.
What type of interference occurs when two waves are in phase?
Constructive
Why two distant flash lights do not produce interference fringes?
to produce interference pattern the sources should be coherent but two independent sources cannot produce such pattern. hence they won't produce interference fringes
How do you produce two coherent sources of light?
two coherent light sources are produced by splitting a single light source
Why should the two coherent sources be monochromatic?
If they are not, the interference patterns become much more complicated, and vary over time.
Why do you use biprism in fresnel biprism experiment?
To make two coherent source for interference .Biprism make two sources.
Describe fresnel biprism?
A fresnel biprism is a triangular right prism with a highly obtuse angle in cross-section. The obtuse angle is near 180 degrees. The typical use of such a prism is to produce two coherent "virtual" light sources from one real point source. These virtual sources can be used to demonstrate interference.
Why will light from two closely spaced stars not produce a steady interference pattern at the earth's surface?
For a steady interference pattern, the two sources of light must be monochromatic and coherent.The light coming from any star contains many wavelengths. Hence, it is not monochromatic.Also, the light is from two different sources. So, the two sources will not be coherent.Because of these reasons, the stars will not produce a stable interference pattern.
What are coherent sources and conditions for it?
Coherent sources are sources of light with a constant phase difference. The conditions for this are that there is a constant phase difference and that the light is of the same wavelength.
What type of interference occurs when two waves are in phase?
Constructive
What are examples of coherent sources?
lasers
Why young used monochromatic source slits?
Young's experiment aimed at observing interference of light waves. To observe clear interference patterns it is necessary to use monochromatic sources. Using monochromatic sources are coherent with constant phase difference so the interference pattern remains same on screen with passage of time. But using just any source will give a changing phase difference and a changing interference pattern which is difficult to observe.
What is the difference between diffraction and diffusion?
Diffraction is the spreading of waves that pass through a narrow opening or move past an obstacle ,whereas, interference is the phenomenon of redistribution of light in a medium as a result of light waves from two coherent sources.
How do you find wavelength of given light source using fresnel's biprism?
Using biprism interference pattern can be produced. Therefrom the band width beta is to be measured. Now using the formula, beta = lambda*D/d Here lambda is the required wavelength of the source light. D is the distance of the screen from the virtual sources. d is the distance between the two virtual coherent sources. Knowing beta, D and d, required lambda could be calculated.
