Charge-coupled devices in astronomy (AQA A-Level Physics): Quizzes

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Charge-coupled devices in astronomy
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What type of device is a charge-coupled device (CCD)?

A semiconductor sensor

What key feature describes the relationship between photons and signal in a CCD?

Linear response

Which is NOT a benefit of CCDs producing digital files?

Requires human intervention

What does the quantum efficiency (QE) formula calculate?

detectedincident×100%\frac{\text{detected}}{\text{incident}} \times 100\%

What is the typical quantum efficiency of photographic film?

Less than 10%

A CCD detects 3400 of 4000 incident photons. What is its quantum efficiency?

85%

What advantage does high quantum efficiency provide for telescopes?

Shorter exposure times needed

What wavelength range can CCDs detect?

200 nm to over 1100 nm

How does pixel size affect CCD resolution?

Smaller pixels produce better resolution

Which photoreceptor cells do astronomical observations primarily rely on?

Rods

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