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CBSE Class 12-science Answered

1.what are the coherent sources?write the condition for the sustained interference pattern.also draw the intensity v/s path difference curve?
2.find the condition for constructive and destructive interference .how does the intensity depend on the width of slit?
3.find the expression for the fringe width .what is the effect on the fringe width if the whole apparatus ydse is completely immersed in aliquid of refractive indexU 
Asked by mahamood.iphone | 22 Dec, 2015, 12:24: PM
answered-by-expert Expert Answer
1. Coherent sources: Two sources are said to be coherent in nature if they emit light of same frequency and of a stable path difference.
 
Conditions for sustained interference pattern:
 
1. The two sources of light must be coherent with same frequency or wavelength and with same phase or constant phase difference.
2. The two sources should preferably have the same amplitude.
3. The two sources must be very close to each other.
4. The sources should emit light waves continuously.
 
Intensity vs Path difference curve:
 
 
NOTE: Kindly ask the other questions as separate queries.
Answered by Romal Bhansali | 22 Dec, 2015, 04:58: PM

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CBSE 12-science - Physics
find the condition for constructive and destructive interference .how does the intensity depend on the width of slit?  
Asked by shivamtkr7767 | 03 Mar, 2024, 12:45: PM
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CBSE 12-science - Physics
find the intensity at a point on a screen in young double slit experiment where the interfering wave of equal intensity have have a path difference of lemda/4,lemda/3
Asked by tannusharan31 | 05 Nov, 2023, 05:31: PM
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CBSE 12-science - Physics
In Young's double slit experiment, the two slits are separated by 0.28mm and the screen is placed at a distance of 1.4m away from the slits. the distance between the centre fringe and the fifth dark fringe is measured to be 1.35cm . calculate the wavelength of light used. Also find the fringe width if the screen is moved 0.4m towards the slits, for the same experiment set up.
Asked by mrwballari999 | 03 Jan, 2023, 09:33: AM
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CBSE 12-science - Physics
if separation between the two slits is increased till fringes are observed then what will happen to angular separation of fringes (my thought is here  fringes are not observed  and they are increasing till fringes show up ...so until then what will happen to angular width if we increase d-slit separation..does angular width increases or remains same  
Asked by neetaspirantdoctor | 20 May, 2022, 03:57: PM
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CBSE 12-science - Physics
coherent sources
Asked by aryanshahi903 | 09 Apr, 2021, 06:14: AM
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CBSE 12-science - Physics
two coherent lights with of intensity 5 into 10 to power per to permit your each superimpose and produce the interference pattern on a screen at a point where the path difference between the wave is Lambda divided by 6 where Lambda is the wavelength of the wave find the first phase difference between wave second resultant intensity at the point
Asked by nehadevi2728 | 19 Mar, 2021, 03:56: PM
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CBSE 12-science - Physics
We for equal wave intensities the intensity at a point is given by straight I to the power of apostrophe equals 4 Icos squared open parentheses straight ϕ over 2 close parentheses but where does the formula straight I to the power of apostrophe equals Icos squared open parentheses straight ϕ over 2 close parentheses come from??
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CBSE 12-science - Physics
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