Length of a terrestrial telescope Calculator

Category	Physics ↺
Physics	Microscopes and telescopes ↺
Microscopes-And-Telescopes	Terrestrial Telescope ↺

✖The focal length of the objective is typically between 2 mm and 40 mm. Magnification and numerical aperture are sufficient for quantifying the essential performance in a microscope.ⓘ Focal length of the objective [f_o]			+10% -10%
✖The focal length of the erecting lens is placed between the objective and eyepiece lenses of an astronomical telescope.ⓘ Focal length of the erecting lens [f]			+10% -10%
✖The least distance of the distinct vision (LDDV) is the closest someone with "normal" vision (20/20 vision) can comfortably look at something.ⓘ Least distance of the distinct vision [D]			+10% -10%
✖The focal length of an eyepiece is the distance from the principal plane of the eyepiece where parallel rays of light converge to a single point.ⓘ Focal length of an eyepiece [f_e]			+10% -10%

✖The length of the telescope is the distance between the objective lens and the eyepiece.ⓘ Length of a terrestrial telescope [L]

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Payal Priya

Birsa Institute of Technology (BIT), Sindri

Payal Priya has created this Calculator and 100+ more calculators!

< 11 Other formulas that you can solve using the same Inputs

Length of an astronomical telescope

Length of the telescope=Focal length of the objective+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece) GO

Length of a compound microscope

Length of the microscope=Distance between two lenses+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece) GO

Magnifying Power of an Astronomical Telescope

Magnifying Power=(1+Focal length of an eyepiece/Least distance of the distinct vision)*Focal length of the objective/Focal length of an eyepiece GO

Magnifying power of a compound microscope

Magnifying Power=(1+Least distance of the distinct vision/Focal length of an eyepiece)*Distance between two lenses/Object distance GO

Magnifying power of a compound microscope at infinity

Magnifying Power=(Distance between two lenses*Least distance of the distinct vision)/Object distance*Focal length of an eyepiece GO

Magnifying power of a simple microscope

Magnifying Power=1+Least distance of the distinct vision/Focal Length Of A Convex Lens GO

Magnifying power of a simple microscope when image is formed at infinity

Magnifying Power=Least distance of the distinct vision/Focal Length Of A Convex Lens GO

Length of an Astronomical Telescope when Image Forms at Infinity

Length of the telescope=Focal length of the objective+Focal length of an eyepiece GO

Length of a Compound Microscope when the Image forms at Infinity

Length of the microscope=Distance between two lenses+Focal length of an eyepiece GO

Magnifying power of an astronomical telescope when image is formed at infinity

Magnifying Power=Focal length of the objective/Focal length of an eyepiece GO

Magnifying Power of a Terrestrial Telescope when Image Forms at Infinity

Magnifying Power=Focal length of the objective/Focal length of an eyepiece GO

< 3 Other formulas that calculate the same Output

Length of an astronomical telescope

Length of the telescope=Focal length of the objective+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece) GO

Length of a terrestrial telescope when image is formed at infinity

Length of the telescope=Focal length of the objective+Focal length of an eyepiece+4*Focal length of the erecting lens GO

Length of an Astronomical Telescope when Image Forms at Infinity

Length of the telescope=Focal length of the objective+Focal length of an eyepiece GO

Length of a terrestrial telescope Formula

Length of the telescope=Focal length of the objective+4*Focal length of the erecting lens+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece)

More formulas

Magnifying power of a simple microscope when image is formed at infinity GO

Magnifying power of a simple microscope GO

Magnifying power of a compound microscope at infinity GO

Magnifying power of a compound microscope GO

Length of a Compound Microscope when the Image forms at Infinity GO

Length of a compound microscope GO

Magnifying power of an astronomical telescope when image is formed at infinity GO

Length of an Astronomical Telescope when Image Forms at Infinity GO

Magnifying Power of an Astronomical Telescope GO

Length of an astronomical telescope GO

Magnifying Power of a Terrestrial Telescope when Image Forms at Infinity GO

Magnifying Power of a Terrestrial Telescope GO

Length of a terrestrial telescope when image is formed at infinity GO

Magnifying Power of a Galilean Telescope when Image forms at Infinity GO

Explain the working of a terrestrial telescope.

Suppose we take objects like stars. Then this object is at infinity and therefore it is real but inverted and diminished. This is acted as an object to the eyepiece. When this object image is fell within the focal length of the other convex lens by adjusting the eyepiece. On the same side of forming the object image, the virtual image of the object image is also viewed through the eyepiece.

What are the uses of a terrestrial telescope ?

Terrestrial telescopes are most commonly used for high magnification viewing over long distances in daylight. Image quality at different magnifications will depend on the optical system, the quality of glass used and the coatings applied to the surfaces of each lens.

How to Calculate Length of a terrestrial telescope?

Length of a terrestrial telescope calculator uses Length of the telescope=Focal length of the objective+4*Focal length of the erecting lens+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece) to calculate the Length of the telescope, The length of a terrestrial telescope is the sum of the focal length of the objective lens, the focal length of the eye-piece lens, and the focal length of the lens placed between objective and eye-piece. Length of the telescope and is denoted by L symbol.

How to calculate Length of a terrestrial telescope using this online calculator? To use this online calculator for Length of a terrestrial telescope, enter Least distance of the distinct vision (D), Focal length of an eyepiece (f_e), Focal length of the objective (f_o) and Focal length of the erecting lens (f) and hit the calculate button. Here is how the Length of a terrestrial telescope calculation can be explained with given input values -> 11.66667 = 0.02+4*0.02+(0.1*0.02)/(0.1+0.02).

FAQ

What is Length of a terrestrial telescope?

The length of a terrestrial telescope is the sum of the focal length of the objective lens, the focal length of the eye-piece lens, and the focal length of the lens placed between objective and eye-piece and is represented as L=f_o+4*f+(D*f_e)/(D+f_e) or Length of the telescope=Focal length of the objective+4*Focal length of the erecting lens+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece). The least distance of the distinct vision (LDDV) is the closest someone with "normal" vision (20/20 vision) can comfortably look at something, The focal length of an eyepiece is the distance from the principal plane of the eyepiece where parallel rays of light converge to a single point, The focal length of the objective is typically between 2 mm and 40 mm. Magnification and numerical aperture are sufficient for quantifying the essential performance in a microscope and The focal length of the erecting lens is placed between the objective and eyepiece lenses of an astronomical telescope.

How to calculate Length of a terrestrial telescope?

The length of a terrestrial telescope is the sum of the focal length of the objective lens, the focal length of the eye-piece lens, and the focal length of the lens placed between objective and eye-piece is calculated using Length of the telescope=Focal length of the objective+4*Focal length of the erecting lens+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece). To calculate Length of a terrestrial telescope, you need Least distance of the distinct vision (D), Focal length of an eyepiece (f_e), Focal length of the objective (f_o) and Focal length of the erecting lens (f). With our tool, you need to enter the respective value for Least distance of the distinct vision, Focal length of an eyepiece, Focal length of the objective and Focal length of the erecting lens and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Length of the telescope?

In this formula, Length of the telescope uses Least distance of the distinct vision, Focal length of an eyepiece, Focal length of the objective and Focal length of the erecting lens. We can use 3 other way(s) to calculate the same, which is/are as follows -

Length of the telescope=Focal length of the objective+Focal length of an eyepiece
Length of the telescope=Focal length of the objective+(Least distance of the distinct vision*Focal length of an eyepiece)/(Least distance of the distinct vision+Focal length of an eyepiece)
Length of the telescope=Focal length of the objective+Focal length of an eyepiece+4*Focal length of the erecting lens

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