← Back to Sensors
All 10 questions. After you submit, each question shows the right answer and why. Back to the quick check
In a camera's light sensor, brighter light frees more electrons than dim light.
Which of these contains a sensor that turns light into electrical signals?
A camera sensor is 4000 pixels wide and 3000 pixels tall. How many megapixels (millions of pixels) is that?
Who shared half of the 2009 Nobel Prize in Physics for inventing the CCD image sensor?
About how high above the Earth do GPS satellites fly?
A kitchen scale's display only changes when the mass on it changes by at least 1 g. Which property of the scale does that 1 g describe?
If a thermometer gives exactly the same reading every time you repeat a measurement, its measurement uncertainty must be zero.
Hubble's original wide-angle camera joined four CCD sensors of 0.64 megapixels each. How many megapixels was that in total?
Using the metrology definitions, explain the difference between a sensor and a measuring transducer, with an example of each.
Each CCD pixel converts light to collected charge, which is read out and digitised. Identify the main factors that limit how faithfully a pixel value represents the light that reached it, and how calibration helps.
