Infrared, ultraviolet and x-ray telescopes (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the wavelength range for infrared telescopes?
What is the wavelength range for infrared telescopes?
to µm
Why must IR telescope detectors be cooled to near absolute zero?
Why must IR telescope detectors be cooled to near absolute zero?
To prevent thermal contamination
At which wavelength ranges are the main atmospheric windows for infrared observation?
At which wavelength ranges are the main atmospheric windows for infrared observation?
to µm and to µm
Which physical effect do UV telescope detectors use to convert photons into electrons?
Which physical effect do UV telescope detectors use to convert photons into electrons?
Photoelectric effect
Below what wavelength does Earth's ozone layer block all UV radiation?
Below what wavelength does Earth's ozone layer block all UV radiation?
nm
Why do X-ray telescopes use grazing incidence mirrors?
Why do X-ray telescopes use grazing incidence mirrors?
X-rays would penetrate normal mirrors
What temperature range is typical for gas that produces X-rays?
What temperature range is typical for gas that produces X-rays?
to K
What is the key design difference of gamma ray telescopes compared to other types?
What is the key design difference of gamma ray telescopes compared to other types?
They use no mirrors at all
What was the detector temperature in the Spitzer Space Telescope?
What was the detector temperature in the Spitzer Space Telescope?
C
What type of mirror system do UV telescopes employ?
What type of mirror system do UV telescopes employ?
Cassegrain mirror system