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The focal length must be equal to the distance between the lens and the image sensor or film in order to have an exact image like the original object. This is known as the focal length being set at the "infinity" position for the lens.

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1y ago

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How can you calculate magnification from the focal length of a lens?

To calculate magnification from the focal length of a lens, you can use the formula: Magnification (Image distance / Object distance) (focal length / focal length - object distance).


Will focal length of mirror change on changing the object distance?

No, the focal length of a mirror does not change when the object distance changes. The focal length of a mirror is a fixed property of the mirror itself. Changing the object distance will affect the position and size of the image formed by the mirror, but not the focal length.


What is the lens focal length formula used to calculate the focal length of a camera lens?

The lens focal length formula used to calculate the focal length of a camera lens is: Focal Length (Distance between lens and image sensor) / (1 (Distance between lens and object) / (Distance between lens and object))


What is the relationship between object distance image distance and focal length of a concave mirror?

In a concave mirror, the relationship between object distance, image distance, and focal length is described by the mirror formula: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. As the object distance changes, the image distance and focal length will also change accordingly.


What is the limit of the object distance to produce a real image?

The limit of the object distance to produce a real image is twice the focal length of the lens or mirror. This occurs when the object distance is equal to the focal length, resulting in the image distance being at infinity. At distances greater than twice the focal length, the real image becomes smaller and inverted.

Related Questions

How can you calculate magnification from the focal length of a lens?

To calculate magnification from the focal length of a lens, you can use the formula: Magnification (Image distance / Object distance) (focal length / focal length - object distance).


Will focal length of mirror change on changing the object distance?

No, the focal length of a mirror does not change when the object distance changes. The focal length of a mirror is a fixed property of the mirror itself. Changing the object distance will affect the position and size of the image formed by the mirror, but not the focal length.


What is the lens focal length formula used to calculate the focal length of a camera lens?

The lens focal length formula used to calculate the focal length of a camera lens is: Focal Length (Distance between lens and image sensor) / (1 (Distance between lens and object) / (Distance between lens and object))


Focal length of a concave mirror?

1/object distance + 1/ image distance = 1/focal length


What is the relationship between object distance image distance and focal length of a concave mirror?

In a concave mirror, the relationship between object distance, image distance, and focal length is described by the mirror formula: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. As the object distance changes, the image distance and focal length will also change accordingly.


What is the limit of the object distance to produce a real image?

The limit of the object distance to produce a real image is twice the focal length of the lens or mirror. This occurs when the object distance is equal to the focal length, resulting in the image distance being at infinity. At distances greater than twice the focal length, the real image becomes smaller and inverted.


How to find the focal length of a lens?

To find the focal length of a lens, you can use the lens formula: 1/f 1/do 1/di, where f is the focal length, do is the object distance, and di is the image distance. Measure the object and image distances from the lens, then plug the values into the formula to calculate the focal length.


How do you find focal length of concave mirror?

The focal length of a concave mirror can be found by using the mirror formula, which is 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance. By measuring the object and image distances from the mirror, you can calculate the focal length using this formula.


A converging lens of focal length f produces a real image of a real object when the object is what?

A real object placed beyond the focal length of a converging lens will produce a real image. This occurs when the object distance is greater than the focal length of the lens.


Do near objects have a longer focal length?

Focal length is related to the lens.  It has nothing to do with how near or far the object is to the lens or objective.


Why should the object be positioned between the focal length point and the convex lens to be magnified?

Placing the object between the focal length point and the convex lens creates a virtual and magnified image. This positioning allows the lens to form a bigger image that is right-side-up compared to the original object. The greater the distance between the object and the lens, the larger the magnification.


What is a focal length?

it is the distance a lense is from an object in order for it to be in focus