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Light and Telescopes
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Slide 54

Advanced technology is spawning a new generation of equipment to view the universe

Advanced technology is spawning a new generation of equipment to view the universe

CCDs (charge-coupled devices)

Large telescopes on remote mountain tops

Mauna Kea in Hawaii

Cerro Pachon in Chile

Adaptive Optics to counteract the blurring of Earthís atmosphere

Orbiting space observatories

Slide 55

A Charge-Coupled Device (CCD)

A Charge-Coupled Device (CCD)

Slide 56

Ordinary Photographs vs. CCDs

Ordinary Photographs vs. CCDs

Film (negative) CCD (negative) CCD (positive)

Same integration (I.e. exposure) time.

Different quantum efficiency: Film 1% CCD 70%

Slide 57

Matching 10-m, multiple mirror Keck Telescopes in Hawaii with adaptive optics

Matching 10-m, multiple mirror Keck Telescopes in Hawaii with adaptive optics

Slide 58

High above Earthís atmosphere, the Hubble Space Telescope provides stunning details about the universe

High above Earthís atmosphere, the Hubble Space Telescope provides stunning details about the universe

Slide 59

What did you think?

What did you think?

What is the main purpose of a telescope?

A telescope is designed to collect as much light as possible. It also improves resolution and magnifies images.

Why do stars twinkle?

Rapid changes in the density of Earthís atmosphere cause passing starlight to change direction, making stars appear to twinkle.

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