# How do you calculate the light collecting area of a telescope?

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Since most telescope objectives are circular, the area = p × (diameter of objective)2/4, where the value of p is approximately 3.1416. For example: a 40-centimeter mirror has four times the light-gathering power as a 20-centimeter mirror [( p402/4) / ( p202/4) = (40/20)2 = 4].

## What is the light collecting area of a telescope?

The aperture of a telescope is the diameter of the light collecting region, assuming that the light collecting region has a circular geometry . For an optical instrument, the aperture is the diameter of the objective lens (refracting telescope) or the primary mirror (reflecting telescope).

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## How much more light collecting area does a 10 inch telescope have than a 5 inch?

Purposes. Collect more light: in order to detect fainter objects. This is the most important function of telescopes. Thus, a 10-in diameter telescope collects (10/5)2 = 22 = 4 times as much light as a 5-in telescope.

## What is the area of a 1’m telescope?

ESO Schmidt telescope

The ESO 1-metre Schmidt telescope, is a Schmidt telescope designed to provide a wide field of view of the sky—equivalent to about the area of 64 full Moons.

## How much more light is collected by a telescope with a mirror that is 30 meters in diameter compared to a telescope with a 10 meter mirror?

TMT, with its 30-meter (nearly 100-foot) diameter mirror, will have nine times the light-gathering power of today’s best telescopes. When compared to the Hubble Space Telescope, TMT will have 156 times the collecting area and more than 10 times its resolution at certain wavelengths.

## How do you calculate light-gathering power?

Comparisons of different-sized apertures for their light-gathering power are calculated by the ratio of their diameters squared; for example, a 25-cm (10-inch) objective will collect four times the light of a 12.5-cm (5-inch) objective ([25 × 25] ÷ [12.5 × 12.5] = 4).

## How does the light collecting area of an 8-meter?

How does the light-collecting area of an 8-meter telescope compare to that of a 2-meter telescope? The 8-meter telescope has 16 times the light-collecting area of the 2-meter telescope. The Chandra X-ray Observatory must operate in space because: X rays do not penetrate Earth’s atmosphere.

## How much more light can a telescope with a 10 meter mirror gather compared to a telescope with a 2-meter mirror?

2. Angular resolution: Telescopes that are larger are capable of taking images with greater detail. How does the collecting area of a 10-meter telescope compare with that of a 2-meter telescope? a) It’s 5 times greater.

## How much more light does an 8 meter telescope gather?

The 8-meter telescope has 16 times the light-collecting area of the 2-meter telescope.

## How do you determine the maximum magnification of a telescope?

It’s equal to the telescope’s focal length divided by the eyepiece’s focal length. As a rule of thumb, a telescope’s maximum useful magnification is 50 times its aperture in inches (or twice its aperture in millimeters).

## How much more light does an 8-meter telescope gather than a 2-meter telescope?

A) The 8-meter telescope has 16 times the light-collecting area of the 2-meter telescope.

## How much more light can a 5 meter telescope collect over a 1 meter telescope?

Thus, a 5-m telescope will produce an image 25 times as bright as a 1-m instrument because a 5-m mirror has 52=25 times the collecting area of a 1-m mirror.

## What is the light collecting area of a 3m diameter telescope?

The amount of light that a telescope can collect is proportional to the cross-sectional area. Now the area of a circle is A=PiR^2=Pi(D/2)^2 in terms of the diameter. Since the area is proportional to the square of the diameter, a 3m diameter telescope can collect 3^2=9 times as much light as a 1m diameter telescope.

## How many times more light can be collected by a telescope with a mirror that is 4 times larger than another telescope?

The amount of light a telescope can collect increases with the size of the aperture. A telescope with a mirror that is 4 meters in diameter can collect 16 times as much light as a telescope that is 1 meter in diameter.

## How much more light does a telescope receive with a 6 meter diameter mirror compared to a telescope with a 2 meter diameter mirror?

ANSWER ——————- A telescope collects light in a rate proportional to the area of its primary mirror which is proportional to the diameter squared. Hence a 6 m telescope collects light (6/2)2 = 9 times faster than a 2 m telescope. A 12 m telescope collects light (12/2)2 = 36 times fasters.

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## How much more light gathering power does the 1 telescope have compared to the human pupil?

The long exposure time of the telescope’s camera enables it to gather much more light than the eye. This enables telescopes to detect much fainter objects than the unaided eye. Combining the results from experiments 1 and 2: The telescope can collect 600 x 900 = 540,000 times more light than your eye!