Exam (elaborations)
chapter21b questions and answers already passed 2024
- Course
- Institution
chapter21b questions and answers already passed 2024
[Show more]
Content preview
chapter 6Which of the following is a principal advantage of CCDs over photographic
film?
CCDs allow long exposures (e.g., minutes or hours), and film does not.
CCDs can be attached to modern telescopes more easily than cameras.
CCDs capture a much higher percentage of the incoming photons than does
film.
CCDs can record the colors of astronomical objects accurately, while film
cannot.
Images recorded with CCDs never require any image processing, while
images recorded by film often do. - correct answer ✔CCDs capture a much
higher percentage of the incoming photons than does film.
Which of the following statements about light focusing is not true?
In a healthy eye, light is focused on the retina.
The focal plane of a reflecting telescope is always located within a few inches
of the primary mirror.
Film should be placed at the focal plane in a camera.
Light can be focused with a lens or a mirror.
If you try to look at an image that is not formed at the focal plane, it will be
blurry. - correct answer ✔The focal plane of a reflecting telescope is always
located within a few inches of the primary mirror.
The lens in your eye forms an upside-down image of the world.
, True
False - correct answer ✔true
Currently, the largest optical telescope mirrors have a diameter of
2 m.
100 m.
10 m.
5 m.
1 m. - correct answer ✔10 m
What do we mean by the diffraction limit of a telescope?
It is the maximum size to which any telescope can be built.
It is the best angular resolution the telescope could achieve with perfect
optical quality and in the absence of atmospheric distortion.
It describes the farthest distance to which the telescope can see.
It describes the maximum exposure time for images captured with the
telescope. - correct answer ✔It is the best angular resolution the telescope
could achieve with perfect optical quality and in the absence of atmospheric
distortion.
The angular resolution of a telescope is never less than its diffraction limit.
True
False - correct answer ✔true
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller LEWISSHAWN55. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now