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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)

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13y ago
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15y ago

Magnification= (Focal Length of Objective Lens)/(Focal Length of Eyepiece) They have to be measured in the same units.

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13y ago

Light Gathering Power

LGP = Aperture in mm divided by 7mm and then squaring the result

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12y ago

A measure of the amount of radiation brought into focus by a telescope.

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13y ago

Light gathering power is the ability of a telescope to collect light, porpotional to the area of the telescope's objective lens or mirror

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12y ago

Is related to the telescope's aperture.

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Q: What is the formula for light gathering power for telescopes?
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Related questions

How do four telescopes of diameter 8m each gather as much light as one of diameter 16m?

the surface area of the 8m (201 m^2) telescope is 1/4 that of the 16m (804 m^2) telescope A=(Pi)r^2


Why does the light gathering power of a telescope vary?

The light gathering power of a telescope is directly proportional to the area of the objective lens of the telescope.


What are the 4 properties of a telescope?

I know of at least three. I hope these help: - magnifying power - light gathering power - field of view


The light gathering power of a telescope increases as the objective increases?

Yes, light gathering power is proportional to the area of the objective. The more light a telescope can gather, the better the telescope will be able to allow the user to see.


What three properties do optical telescopes have aid astronomers?

1) light-gethering power, 2) resolving power, and 3) magnifying power


What makes a telescope powerful?

The light-gathering power of a telescope is determined by its aperture, which refers to the width of a telescopes primary mirror or objective lens.


How can you determine the light gathering power ratio between a 1 meter telescope and a 10 meter telescope?

The light gathering power is directly proportional to the light gathering area, so all you have to do is figure out the ratio of the areas of the two scopes. Another answer: Do you remember fourth grade arithmetic? Do you remember pi r square?


What is replacting telescope?

answ2. Telescopes come in two flavours, reflecting and refracting.Reflecting telescopes rely on the light first meeting a mirrored reflector which may be of large area, then passes through various focusing lenses.Refracting telescopes have the light passing through a lens, before meeting the focusing lenses etc.Now, there is a loss of light each time the light passes into or out of a glass, even ignoring imperfections of the surface. And more when that is considered.And it is more than doubly difficult to make a large lens than a large mirror.And since astronomy is mainly limited by the light-gathering power, this is vital to astronomers.A1. Nothing. Any device to see the light of distant stars or other objects would still be called a telescope.


Are light-gathering power and resolving power determined by the primary mirror of a telescope?

Yes, both have to do with the diameter of the objective mirror/lens


Why do astronomers continue to build even larger telescopes?

Radio telescopes allow us to see things that can't be seen in visible light. And vice versa, optical telescopes can show things that are not visible in radio telescopes. So, the information from both kinds of telescopes really complements each other.


What does the light gathering ability of a telescope depend on?

A refracting telescope is a type of optical telescope. It was used in astronomical telescopes and spy glasses. Objective lens are used to produce the image.


If the radius of an objective mirror of a telescope is tripled its light-gathering power is likely to become?

9 times greater.