If f1 and f2 are the distances from the optical centre of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good-A-f = f1 + f2B-f = (f1 + f2)C-D-none of these.-C-

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C  In tachometry focal length i.e, the length of focus f (inverse) is equal to the inverse length of (i) length between the lens and intercept staff f1 (ii) length between crosshair and lens f2. 1/f=(1/f1)+(1/f2).

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If f₁ and f₂ are the distances from the optical centre of a convex lens of focal length f to conjugate two points P₁ and P₂ respectively, the following relationship holds good

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If f1 and f2 are the distances from the optical centre of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good

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If f₁ and f₂ are the distances from the optical centre of a convex lens of focal length f to conjugate two points P₁ and P₂ respectively, the following relationship holds good

For help Students Orientation
Mcqs Questions