How have telescopes advanced over the years?
First telescopes were built by spectacle lenses..\by a dutch optician.
named Hans lippershey.
As refractors have chromatic and spherical aberration, Sir Isaac Newton made reflector telescopes, replacing lenses with mirrors over time. Currently, a 10-meter telescope is in use, and a 30-meter one is planned. Since visible light alone does not originate from stars and galaxies, space telescopes that operate on X, Gamma, and UV rays, among other wavelengths, were created and sent to space to observe in such wavelengths. Today, we have radio telescopes, X, gamma, UV, and infrared telescopes, among other types of telescopes.
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Telescopes have advanced through innovations such as the development of refracting telescopes in the 17th century, the introduction of reflecting telescopes by Newton, and the use of technology like radio and space telescopes in the 20th century. Modern telescopes benefit from improved optics, adaptive optics, and digital imaging technologies, enhancing observational capabilities across different wavelengths.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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