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Length of a lens is the distance from the center of the lens to its principal focus?
Wiki User
∙ 13y ago
It is called the focal length. It is equal to 1/2 times r, and is positive on concave mirrors and negative on convex mirrors.
Wiki User
∙ 15y ago
That is incorrect. The length of a lens, or focal length, is the distance from the lens to its principal focus.
Wiki User
∙ 13y agoThis is called the focal length of the lens.
Wiki User
∙ 14y agofocal length
Wiki User
∙ 12y agoFocal length
Wiki User
∙ 13y agofocal
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What is distance of principal focus from optical centre called?
The distance of the principal focus from the optical center is called the focal length.
The blank length of lens is the distance from the center of the lens to its principle focus is what?
The blank you are referring to is the focal length of the lens. It is the distance from the center of the lens to its principal focus, where parallel rays of light converge after passing through the lens.
Whats the focal length of a lens?
The focal length of a lens is the distance between the lens and the image sensor when the subject is in focus. It is a measure of how strongly the lens converges or diverges light rays. Shorter focal lengths result in wider fields of view and greater magnification, while longer focal lengths result in narrower fields of view and less magnification.
How can you tell what the focal length is for a lens?
The focal length of a lens is typically indicated on the lens itself or in the lens specifications provided by the manufacturer. It is measured in millimeters and represents the distance between the lens's optical center and the image sensor when the subject is in focus. Additionally, you can calculate the focal length by experimenting with the lens to find the point where objects are in focus and measuring the distance from the lens to the sensor.
What is an imaginary straight line drawn perpendicular to a concave mirror at its center?
The line is called the principal axis. It passes through the center of curvature and focus of the mirror.
What is distance of principal focus from optical centre called?
The distance of the principal focus from the optical center is called the focal length.
The distance from the center of the lens to its principal focus is called the what?
Focal length
The blank length of lens is the distance from the center of the lens to its principle focus is what?
The blank you are referring to is the focal length of the lens. It is the distance from the center of the lens to its principal focus, where parallel rays of light converge after passing through the lens.
Whats the focal length of a lens?
The focal length of a lens is the distance between the lens and the image sensor when the subject is in focus. It is a measure of how strongly the lens converges or diverges light rays. Shorter focal lengths result in wider fields of view and greater magnification, while longer focal lengths result in narrower fields of view and less magnification.
What is a focal length?
it is the distance a lense is from an object in order for it to be in focus
How can you tell what the focal length is for a lens?
The focal length of a lens is typically indicated on the lens itself or in the lens specifications provided by the manufacturer. It is measured in millimeters and represents the distance between the lens's optical center and the image sensor when the subject is in focus. Additionally, you can calculate the focal length by experimenting with the lens to find the point where objects are in focus and measuring the distance from the lens to the sensor.
What is focal length?
Focal length is the distance between the optical center of a lens and the image sensor when the lens is focused on a subject at infinity. It determines the magnification and field of view of the lens, with shorter focal lengths providing wider angles of view and longer focal lengths providing narrower angles of view. Focal length is commonly measured in millimeters.
What is an imaginary straight line drawn perpendicular to a concave mirror at its center?
The line is called the principal axis. It passes through the center of curvature and focus of the mirror.
What is meant by 'principal focus' in a convex mirror?
The principal focus of a convex mirror is the point where incident light rays parallel to the mirror's axis converge upon reflection. It is located behind the mirror and is used to define the focal length and to determine the image formation properties of the mirror.
What is the exact relation of the focal length to the center of curvature?
The focal length (a.k.a focus) is exactly half the length of the centre of curvature. ie. F = 1/2 C
How do you focus?
There is usually a knob on the binoculars for you to adjust the focus. When the focal length is adjusted, images of varying sharpness is obtained. Thus yu are adjusting the distance of the lens.
Where will the image form when you place an object on the principal axis of a concave mirror at a point between focus and centre of curvature?
The image will form behind the mirror, between the focus and the center of curvature, and it will be a virtual, upright, and magnified image.
