Write Newton's formula for any lens . and give the meaning of symbol ??
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Answered by
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See the diagram. This is for a convex lens. But the formula is valid for any lens.
x1 = OF1. x2 = F2I.
f1 and f2 are focal lengths of two halves of the lens.
x1 and f1 are negative (like u) by convention. f2, x2, f and v are positive quantities.
Newton's law states that
f1 * f2 = x1 * x2.
If R2 = - R1 = R and f2 = - f1 = f then,
x1 * x2 = - f^2.
Law:
The product of distances of object and image from respective foci is equal to the product of focal lengths (of half lenses).
Also know the Gaussian form of lens equation:
1/v - 1/u = 1/f.
Here u is -ve. u & f are +ve.
m = v/u = f/x1 = - x2/f.
x1 = OF1. x2 = F2I.
f1 and f2 are focal lengths of two halves of the lens.
x1 and f1 are negative (like u) by convention. f2, x2, f and v are positive quantities.
Newton's law states that
f1 * f2 = x1 * x2.
If R2 = - R1 = R and f2 = - f1 = f then,
x1 * x2 = - f^2.
Law:
The product of distances of object and image from respective foci is equal to the product of focal lengths (of half lenses).
Also know the Gaussian form of lens equation:
1/v - 1/u = 1/f.
Here u is -ve. u & f are +ve.
m = v/u = f/x1 = - x2/f.
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Answer:in image
Explanation:
In image.
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