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extende source is required to get nearly parallel rays of light

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12y ago

to observe a clear difference between dark and light fringes

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Q: Why is an extended source used in newtons ring experiment?
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What will happen if a point source is used instead of extended source in Newton's ring experiment?

The rings may formd but the lack of intensity of light,the dark and light rings are not vissiable very well..


What happened in newtons ring experiment if the glass plate is replaced by mirror?

if we use glass plate then ring's will be clear


What is the order of the colours obtained in newtons ring experiment if illuminated with white light?

The centre spot will be dark even when we use white source. As the radius of the ring is directly proportional to the square root of the wavelength, the violet being the shortest wavelength will come first and red will be the last as its wavelength is the longest in the visible region. Any how we cannot get sharp coloured rings around the black spot. Instead overlapping occurs and just multicoloured rings can be seen.


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Where are the rings formed in newton's ring experiment?

they are formed at the point of contact of lens and glass plate


Why should you use a convex lens of large radius of curvature in performing newtons ring experiment?

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Why there are lines in air wedge and circles in newton's rings?

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