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Why is chromatic aberration a prime consideration in designing a telescope objective?
Wiki User
∙ 13y ago
Chromatic aberration refers to the inability of a lense to focus all the wavelengths of light to the same point. Because of this, the images in a telescope will be less acurate and less focused. A large telescope with a huge aperture but very bad chromatic aberration would not be of much use to a scientist or even an amatuer astronomer because of these limitations.
Wiki User
∙ 13y ago
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What causes chromatic aberration in the objective lens of a telescope?
The most chromatic aberration would occur with a single-lens refractor. However, today most telescopes employ at least two lenses, called achromats. These still incur significant chromatic aberration if the telescope has a short focal length to aperture ratio, called focal ratio. An easy way to determine if the telescope will have significant chromatic aberration is to divide the focal ratio of the telescope by the diameter of the lens in inches. A value of 5 or higher indicates minimal chromatic aberration; 3 to 5 is moderate aberration, and 3 and under is significant chromatic aberration. However, chromatic aberration is generally only obvious on bright stars or planets.
What are the objectives of fashion designing?
The Objective of Fashion Designer are:1. Design the Clothes according to the People preference.2. Clothes are comfortable to the wearer.3. Designing is according to the envoriment of City/Place.
What is the importance of 7c's?
it is a core objective of any communication. which are completeness, consciseness, consideration, correctness, etc.
What does objective manner mean?
The phrase "objective manner" refers to a behavior pattern that is done without the influence of personal opinions. For example, an audit done in an objective manner doesn't take the opinions of the auditor into consideration.
What is a major disadvantage of using a lens to gather light in a telescope?
How about a few? Absorption of light through the lens(es). Chromatic aberation, requiring, preferably, a multiple lens like an achromatic or apochromatic lens which increases absorption. Reflection of light off of the objective lens. Maximum exposure to the elements, causing fogging. Maximum diameter of about 40 inches due to gravity. Difficulty of making at least four optical surfaces to reduce chromatiic aberation (and, these must stay aligned for the life of the telescope). Enough?
Explain the rationale for selecting shareholders wealth maximizatio as the objective of the firm?
Explain the rationare for selecting shareholder wealth maximization as the objective of the firm.Include a consideration of profit maximization as an alternative goal
What is the objective of understanding how to design a car jack?
The main objective is that it works and can safely lift a car enough to enable a punctured tyre to be replaced with the spare. Any designing should keep this in mind, though cast of production is another factor that needs to be considered.
What is web catalyst?
WebCatalyst was formed with an objective of providing its customers with online solutions in innumerable spheres ranging from Web Designing, Web Development, Logo Designing, Internet Marketing, SEO and more. The success of a business lies in its visibility, whether offline or online.
Why the bang theory?
Question inappropriately worded - i.e. there is no "bang theory" and "why" is not a concise interrogative consideration without a proper objective. A question should have a subject, verb, and object.
What is the advantage of using a concave mirror in the place of convex lens as objective in a telescope?
Using a concave mirror as the objective in a telescope offers several advantages over a convex lens. First, it eliminates chromatic aberration, which is the distortion of colors in an image caused by a lens. Second, it allows for a wider field of view. Lastly, it is easier to manufacture large mirrors compared to large lenses, making it more practical for telescopes with larger apertures.
What telescope with 2 lenses called?
A refracting telescope uses lenses. The primary objective is the larger lens and the first point of light refraction. A smaller, secondary lens is located between the primary lens and the eyepiece as acts as another refraction device to correct or reverse the refractive aberration of the primary.
Did isaac newton invented the telescoped?
Neither Newton nor Galileo invented the telescope. It was developed independently by various dutch optics makers (Lippershey submitted the first patent). Galileo's first telescope was dutch-made, and he made useful improvements to the initial retractor design. Newton did invent the reflecting telescope (the particular design is now called a Newtonian Telescope). Further improvements to the reflector design were made by Cassegrain and others made improvements to the manufacturing process, greatly improving the mirror quality. A refracting telescope uses a lens as the main objective, while a reflecting telescope uses a mirror. The objective is the component that focuses the light. Reflector telescopes are the most common nowadays, as they do not suffer from chromatic aberration (light splitting due to refraction) and can be built in very large diameters. --- Galileo improved the refracting telescope, but Newton invented the reflecting telescope.
