Which of the following relations hold nbsp-good where F is the focal length and R is the radius of curvature-R - F nbsp-F - nbsp- R-2-R - nbsp-F-2-F - 2R-

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Standard IX

Physics

Relationship between Focus and Radius of Curvature

Which of the ...

Question

Which of the following relations hold good where F is the focal length and R is the radius of curvature.

R = F

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R = $\frac{F}{2}$

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F = $\frac{R}{2}$

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F = 2R

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Solution

The correct option is C
F = $\frac{R}{2}$

The focal point occurs at the midpoint between pole and radius of curvature. So, if
radius of curvature = R

F = $\frac{R}{2}$

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Which of the following relations hold good where F is the focal length and R is the radius of curvature.

The correct option is C F = R2 The focal point occurs at the midpoint between pole and radius of curvature. So, if radius of curvature = R F = R2

The correct option is C
F = $\frac{R}{2}$

The focal point occurs at the midpoint between pole and radius of curvature. So, if
radius of curvature = R

F = $\frac{R}{2}$