Spherometer experiment (calculation of least count and tabulation- part-1 )

This video is useful for the standard- XI & XII. In this video one will learn how to calculate the least count of spherometer and take the readings. This is the part-1 of the practical ' To measure the radius of curvature of a given spherical surface(convex/concave) by using spherometer.'
For learning screw gauge / vernier calliper click on the following link:
• To measure the diamete... - vernier calliper
• To measure the diamete... - screwgauge
• To measure the diamete... - screwgauge
For learning refraction of light click on the following link:
• DID YOU KNOW ?(REFRACT...

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[@tubeboss6498]

This is a very tidious method. Instead we can take total reading ( m.s.r plus c sr ) on spherical surface and on plain surface and substract it. That will give you h.

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Correct

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Hello mam do we have non contact method apart from spherometer like camera systems or machine vision system to do this highest point on the lens or curvature of the lens

[@tanvirahmed3771]

It's very complicated that you teach. If you use the liner scale also. It will be more easier.

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[@debrajdas5615]

Mam what if the circular scale reading is 0 in both?

[@behindthecurtains7582]

No problem because you have Pitch scale reading (PSR). Total Reading is PSR+CSR

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[@tigerhunters6621]

Mam, how can I find error in convex lens and concave lens at spehrometer???

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How I will start second observation, I mean am I start the second observation from the watch glass at the same point?

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Why we r taking in CM?

[@behindthecurtains7582]

You can take it in millimeter also.

[@Legit_India]

Ma'm why is the 0 of circular scale is not coinciding with 0 on the vertical scale when taking them on the same position Across each other?

[@behindthecurtains7582]

That is called Zero error. But by this method you don't have to check the zero error.

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Ma'm i was very confused of the short form of the terms in the tabulation,you should name them in full !

[@behindthecurtains7582]

ICSR- Initial circular scale reading(I) NCR- Number of complete rotation FCSR- Final circular scale reading(F) I difference F PSR- Pitch scale reading CSR- Circular scale reading I hope this will be helpful.

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number of divison has no unit its a pure number

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