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yes, focal lens length has three classifications
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∙ 2013-10-28 12:34:07
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Which of the two has a greater power a lens of short focal length or a lens of large focal length?
A lens of short focal length has a greater power (than a lens of large focal length)
Whats the focal length of a lens?
The focal length of a lens is the distance from the principal foci to the center of the lens.
What will happen to the focal length of a lens if it is cut into half vertically?
When the lens is cut vertically then the focal length of the lens will increase.the focal length will become approx double.
How does the thickness of a lens affect the focal length of a lens?
More the thickness, less the focal length.
Which lens has a greater power convex lens of focal length 10 cm or a convex lens of focal length 20cm?
Power is inversely related to the focal length. So convex lens of focal length 20 cm has less power compared to that having focal length 10 cm
What is defined as the distance between a lens and its focal point?
focal length of the lens
What is the focal length of a convex lens?
The distance from the centre of the lens to the focal point.
What is the focal length of the convex lens?
The distance from the centre of the lens to the focal point.
What are the factors affect on focal length of lens?
There are three factors affecting the focal length of a lens. 1. refractive index of the material of lens. 2. refractive index of the surrounding medium 3. the radius of curvature of the lens surfaces.
How does change in the thickness of lens change the focal length of lens?
Not at all. The focal length is determined by the curvature of the surfaces.
Which lens in a refracting telescope has a shorter focal length?
The eyepiece will have a shorter focal length than the objective lens has.
If a telescope has an objective lens of 3 inches what is the focal length?
The size (diameter) of a lens does not determine its focal length. The amount of curvature of the lens does. Citing a diameter for a lens doesn't help us find the focal length. Lenses are ground to specifications that allow short or long focal length. The more curved the lens, the shorter the focal length. You can see this if we specify a given curvature and then start to "flatten" the lens. The focal length will get longer and longer as the lens is flattened. When the lens is flat (has to curvature) the lense has an infinite focal length, just like a piece of flat glass.
