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Chapter 6: Problem 11

What kind of telescope would you use if you wanted to take a color photograph entirely free of chromatic aberration? Explain your answer.

Short Answer

Expert verified
A Reflecting telescope (reflector) should be used if one wants to take a color photograph entirely free of chromatic aberration because it utilises mirrors instead of lenses to focus light, therefore eliminating chromatic aberration.

Step by step solution

01

Understand Chromatic Aberration

Understand what chromatic aberration is. It is a phenomenon in optical systems where the lens fails to bring all wavelengths of color to the same focal plane, causing a color fringing effect in the image.
02

Understand Types of Telescopes

Understand different types of telescopes - specifically reflector telescope, refractor telescope, and catadioptric telescope. A refractor telescope suffers from chromatic aberration because it uses a lens to gather and focus light.
03

Selection of Appropriate Telescope

Select the appropriate telescope. In this case, a Reflecting telescope (Reflector) is the best choice for taking color photographs entirely free of chromatic aberration as it uses mirrors, rather than lenses, and hence doesn't suffer from chromatic aberration.

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Most popular questions from this chapter

What is active optics? What is adaptive optics? Why are they useful? Would either of these be a good feature to include on a telescope to be placed in orbit?

Compare an optical reflecting telescope and a radio telescope. What do they have in common? How are they different?

Explain why a flat piece of glass does not bring light to a focus while a curved piece of glass can.

Obtain a telescope during the daytime along with several eyepieces of various focal lengths. If you can determine the telescope's focal length, calculate the magnifying powers of the eyepieces. Focus the telescope on some familiar object, such as a distant lamppost or tree. DO NOT FOCUS ON THE SUN! Looking directly at the Sun can cause blindness. Describe the image you see through the telescope. Is it upside down? How does the image move as you slowly and gently shift the telescope left and right or up and down? Examine the eyepieces, noting their focal lengths. By changing the eyepieces, examine the distant object under different magnifications. How do the field of view and the quality of the image change as you go from low power to high power?

What is a charge-coupled device (CCD)? Why have CCDs replaced photographic film for recording astronomical images?
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