Question

write your observations and procedure to see if the convex lens changes its focal length when placed in water​

Answer 1

Answer:

Explanation:

At the point when the raised focal point is in air, it's focal length is given by  

1/f(air)=(n-1)[(1/R1)- (1/R2)]… … (A)  

Here, n is the refractive list of the material of focal point comparative with air.  

R1 and R2 are radii of the shape of two surfaces of a curved focal point. Surface on the article side has a positive sweep of the ebb and flow and that contrary side has a negative span of the bend.  

Presently, when the focal point is put in water of refractive file n', the refractive record of the focal point is  

1/f(water)=[(n-n')/n'][(1/R1)- (1/R2)]… … (B)  

It is obvious from conditions (A) and (B) that f(water)>f(air).  

Extra Note: If a raised focal point is set in a medium whose refractive record is more noteworthy than the refractive list of the material of focal point, at that point it will carry on as a curved focal point

Answer 2

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