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A converging lens of focal length f produces a real image of a real object when the object is what?
Wiki User
∙ 14y ago
farther then f from the lens
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoThe image will form at infinity!
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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.
Would the ocular unit increase or decrease as magnification increases?
Field of view will decrease as the aperture remain same but things become larger and so we can see smaller area after magnification
What is Charcot-Wilbrand syndrome?
Charcot-Wilbrand is a type of syndrome that involves dream loss. This syndrome often occurs after a person suffers from focal brain damage. It is sometimes known as mind blindness.
Which part of an optical microscope contains the magnifying lens?
The body tube of a compound optical microscope contains two lens systems, the objective lens composed of one or several lenses that magnify the image of the object being examined, and the ocular lens at the eyepiece end. The magnification of the microscope depends on the focal lengths of the two lens systems.
Whether presence of water cause forest fire?
What causes the forest fire is not the presence of water, but rather the absence of it. Water puts out fires and prevents wet items from burning - you cannot hope to burn a wet towel unless the fire is there for long enough that the heat causes all the water in a particular area to evaporate. However when the object is dehydrated and then overheated, or if a spark lands on it, it will burn easily. A drought resulting in many dehydrated branches and leaves would increase the likelihood of a forest fire.
What is the focal length of a converging lens which produces a virtual image four time the size of the object the image being 15 cm from the lens?
t78tt
In the distance from a converging lens to the object?
c virtual,upright,and larger than the object.
Where must an object to be located for a converging mirror to produce a virtual image?
if the focal length is greater than the object distance from the lens
Where must an object be located for a converging mirror to produce a virtual image?
if the focal length is greater than the object distance from the lens
A converging mirror has a focal length of 20cm Where should an object be placed so that its virtual image will be twice as tall as the object?
10cm
Where is the only location where a converging mirror will not produce an image?
When the object lies within its focal length then no real image can be produced
If the distance from a converging lens to the object is less than the focal length of the lens what willl the image appear to be?
C: virtual, upright, and larger than the object
Is a magnifying glass a converging lens or a diverging lens?
A converging lens is a simple magnifying glass when the object is within one focal length of the lens. The image is then virtual, magnified, and right-side up.
Is the image from a converging lens real or virtual?
If the object is more distant from the lens than the focal length of the lens, a real image is formed.
Why is power is used as reciprocal of focal length?
The tendency to converge the rays decides the power factor. So shorter the focal length converging is tremendous. Hence power is reciprocal of focal length
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.
What are the two possibilities for an image formed by a convex lens?
Convex (I prefer converging lenses) lenses are thicker in the middle than at the edges. This causes the rays to converge towards the principle axis (line running through the center of the lens perpendicular to the surface). two images will be formed. When the object you are viewing is farther from the lens than the focal length you will have an inverted real image. This image can be enlarged (when the object is between the focal length and twice the focal length), the same size (when the object is twice the focal length from the lens) or reduced (when the object is beyond twice the focal length). When the object is closer to the lens than the focal length you are using the lense as a magnifying glass and you will have an upright virtual image.
