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11-01-2017
Physics

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Light rays from an object after passing through a convex lens form an image at the focal point behind the lens (opposite side of the object). What is the actual position of the object? at the focal point in front of the lens at twice the focal length between the focal point and twice the focal length at a great distance, effectively infinite between the focal point and the lens NextReset

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aristocles aristocles

31-05-2019

Answer:

effectively infinite between the focal point and the lens

Explanation:

Light rays from an object after passing through a convex lens form an image at the focal point behind the lens (opposite side of the object).

Now from lens formula we know that

[tex]\frac{1}{d_i} + \frac{1}{d_o} = \frac{1}{f}[/tex]

now we know that image forms at focal point

so we will have

[tex]d_i = f[/tex]

now from the equation above

[tex]\frac{1}{f} + \frac{1}{d_o} = \frac{1}{f}[/tex]

so we will have

[tex]\frac{1}{d_o} = 0[/tex]

so position of object is at infinite distance from lens

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