CERTIFICATE
This is Certified to be the bona fide work
of the "Ayan Ali", a student of Class XII
Section-B has successfully completed his
Physics Investigatory Project on the Topic
"To find the refractive indexes of (a) Water
(b) Oil using a plane mirror, an equiconvex
lens, and an adjustable object needle.,
Under the guidance of "Mr. Abhishek
Srivastava Sir".
External's Signature Internal's Signature
Principal's Signature School Stamp
ACKNOWLEDGEMENT
I Would Like To Express My Immense Thanks
Of Gratitude To My Physics Teacher
"Mr.Abhishek Srivastava" Who Gave Me The
Golden Opportunity To Do This Wonderful
Project On "Refractive Index" Who Also Helped
And Guided Me In Completing My Project.
Secondly, I Would Also Like To Thanks
Principal Mam "Mrs.Nimisha Srivastava" And
Vice Principal Mam "Mrs.Tapasi Dhar" For
Providing Me All The Facility That Was
Required.
Lastly, I Would Also Like To Extend My
Gratitude To My Parents And Friends For Their
Suggestions And Constructive Criticism. Their
Support Made This Project Fruitful.
OBJECTIVE:
APPARATUS:
DIAGRAM:
Fig: Focal length of glass convex les and liquid lens
combination
THEORY:
1.
1 f =1f1+1f2 or ff2f1-f
1f2=n- 1 1R1- 1R2
n- 1 1R1- 1∞
1R- 0
1f2 n- 1R
Rf2+1
l26h+h2
l1+ l2+ l33
(i) l= l1+l2l33 = … … … ..c m
(ii) R=l26h+h2 = … … … ..c m
(iii) f2=ff1f-f1 = … … … .c m ( w a te r)
= ………
c m (tra n s p a re n t liq u id )
(iv ) n=1+Rf2 = … … … .c m (w a te r)
= …………
c m (tra n s p a re n t liq u id )
nw
nl
INDEX
▶ Acknowledgement
▶ ObjectiveAndApparatus
▶ Diagram
▶ Theory
▶ Procedure
▶ Observations
▶ Calculations
▶ Results
▶ Precautions
▶ SourcesOfErrors
