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Basically because, in a convex mirror, the curvature is the opposite of that of a concave mirror. It's bevaviour is opposite, too: incoming light is spread out, instead of being focussed.
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∙ 9y ago
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∙ 11y agoyes,
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Do thick concave lenses have longer or shorter focal lengths than thin concave lenses?
It have a shorter focal length because there is more time for the light rays to come together
Why is concave lens called a negative lens?
Concave lens is called a negative lens because it has a negative focal length.
How can a rough value of the focal length of a concave mirror be obtained?
rough focal length of concave mirror
Length of a lens is the distance from the center of the lens to its principal focus?
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.
Why do images in a concave mirror appear inverted?
If an object's distance from the concave mirror is greater than the mirror's focal length, then the mirror image of it will be inverted. If the distance from the concave mirror is less than the focal length of the mirror, the image will not be inverted. No image will be produced if the distance from the mirror to the object is equal to the mirror's focal length.
How do you find the power of lenses using focal lengths?
Power (F)= 1/focal length (f) focal length f, is measured in meters the power, F, is in dioptres (D) In converging or convex lenses the power is positive In diverging or concave lenses, the power is negative :)
Do thick concave lenses have longer or shorter focal lengths than thin concave lenses?
It have a shorter focal length because there is more time for the light rays to come together
Why is concave lens called a negative lens?
Concave lens is called a negative lens because it has a negative focal length.
Will the focal length of concave lens change in water?
no, because this happens only in the cases of lenses
How can a rough value of the focal length of a concave mirror be obtained?
rough focal length of concave mirror
Length of a lens is the distance from the center of the lens to its principal focus?
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.
The distance between a mirror and its focal point is called the?
Focal length, positive number with a concave mirror, negative for a convex mirror.
If Jane is myopic. Will she need concave or convex lenses explain?
Concave. With myopia, the focal point of the eye is in front of the retina. Concave lenses increase the distance of the focal point so that it lies on the surface of the retina.
What is the positive lens is the same as?
The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror. The focal length of an optical system is a measure of how strongly the system converges or diverges light.
What are the types of lenses?
There are two types of lenses - fixed focal and zoom lenses.
What are diverging and converging lenses?
Lenses enable individuals to view objects. A Converging lens has a positive focal length, which facilitates the convergence of the exiting rays. While, diverging lenses have a negative focal length, which facilitates the divergence of the exiting rays.
Focal length of a concave mirror?
1/object distance + 1/ image distance = 1/focal length
