Charge-coupled devices in astronomy (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What type of device is a charge-coupled device (CCD)?
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?
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?
Which is NOT a benefit of CCDs producing digital files?
Requires human intervention
What does the quantum efficiency (QE) formula calculate?
What does the quantum efficiency (QE) formula calculate?
What is the typical quantum efficiency of photographic film?
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?
A CCD detects 3400 of 4000 incident photons. What is its quantum efficiency?
85%
What advantage does high quantum efficiency provide for telescopes?
What advantage does high quantum efficiency provide for telescopes?
Shorter exposure times needed
What wavelength range can CCDs detect?
What wavelength range can CCDs detect?
200 nm to over 1100 nm
How does pixel size affect CCD resolution?
How does pixel size affect CCD resolution?
Smaller pixels produce better resolution
Which photoreceptor cells do astronomical observations primarily rely on?
Which photoreceptor cells do astronomical observations primarily rely on?
Rods
