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Why the aperture and focal length of objective of a microscope are small?
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Does the numerical aperture of an objective depend on the focal length of the objective?
Yes.
How is magnifying power of telescope and a microscope are a affected by increasing the focal length of their objectives?
The magnification of a telescope M is the the focal length of the objective Fo over the focal length of the eyepiece Fe so increasing the focal length of the objective increases the magnification. The magnification of a microscope M is approximately tube length L/Fo x 25/Fe. Therefore increasing the focal length of the objective reduces the magnification.
Why is the focal length of the objective lens in a microscope short?
To improve magnification. Also so that we can get a real and inverted image
Why a small focal length convex lens is used in simple microscope?
because manifying power has inerse relation with that of focal length
What is more powerful out of the Objective or the Eye piece lens?
The focal length of EyePiece is relatively larger to that of the Objective lens. Power of a lens is inversely proportional to it's focal length. Therefore, Objective is slightly more powerful than EyePiece.
Does the numerical aperture of an objective depend on the focal length of the objective?
Yes.
How is magnifying power of telescope and a microscope are a affected by increasing the focal length of their objectives?
The magnification of a telescope M is the the focal length of the objective Fo over the focal length of the eyepiece Fe so increasing the focal length of the objective increases the magnification. The magnification of a microscope M is approximately tube length L/Fo x 25/Fe. Therefore increasing the focal length of the objective reduces the magnification.
What is the formula for light gathering power for telescopes?
For visual observation: Magnification = (Focal Length of Objective Lens) divided by (Focal Length of Eyepiece) (They have to be measured in the same units.) For prime-focus photography: (One focal-length of the Objective Lens on the film) = (one radian in the sky)
What is the significance of the term compound in describing a modern light microscope?
A compound microscope contains an objective lens with a very short focal length and an eyepiece with a longer focal length. Both lens are mounted in the same tube.
Why is the focal length of the objective lens in a microscope short?
To improve magnification. Also so that we can get a real and inverted image
What happens if you decrease a telescopes eyepiece focal length?
The magnification of the telescope image is(focal length of the objective) divided by (focal length of the eyepiece).The focal length of the objective is fixed.Decreasing the focal length of the eyepiece increases the magnification of the image.(But it also makes the image dimmer.)
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 will decreasing a telescope's eyepiece focal length?
The magnification of the telescope image is(focal length of the objective) divided by (focal length of the eyepiece).The focal length of the objective is fixed.Decreasing the focal length of the eyepiece increases the magnification of the image.(But it also makes the image dimmer.)
What is the importance of oil in oil immersion lens of compound microscope?
In light microscopy, oil immersion is a technique used to increase the resolution of a microscope. This is achieved by immersing both the objective lens and the specimen in a transparent oil of high refractive index, thereby increasing the numerical aperture of the objective lens.
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 with a focal length of 50 centimeters and an eyepiece with a focal length of 25 millimeter what will be the magnification?
20
How do you calculate magnification?
Divide the focal length of the objective lens by the focal length of the eyepiece.
