Topic 14 - Digital Technology
From KstructIB
[edit] 14.1 Analogue and digital signals
14.1.1 Solve problems involving the conversion between binary numbers and decimal numbers.
14.1.2 Describe different means of storage of information in both analogue and digital forms.
14.1.3 Explain how interference of light is used to recover information stored on a CD.
14.1.4 Calculate an appropriate depth for a pit from the wavelength of the laser light.
14.1.5 Solve problems on CDs and DVDs related to data storage capacity.
14.1.6 Discuss the advantage of the storage of information in digital rather than analogue form.
14.1.7 Discuss the implications for society of ever-increasing capability of data storage.
[edit] 14.2 Data capture; digital imaging using charge-coupled devices(CCDs)
14.2.1 Define capacitance.
14.2.2 Describe the structure of a charge‑coupled device (CCD).
14.2.3 Explain how incident light causes charge to build up within a pixel.
14.2.4 Outline how the image on a CCD is digitized.
14.2.5 Define quantum efficiency of a pixel.
14.2.6 Define magnification.
14.2.7 State that two points on an object may be just resolved on a CCD if the images of the points are at least two pixels apart.
14.2.8 Discuss the effects of quantum efficiency, magnification and resolution on the quality of the processed image.
14.2.9 Describe a range of practical uses of a CCD, and list some advantages compared with the use of film.
14.2.10 Outline how the image stored in a CCD is retrieved.
14.2.11 Solve problems involving the use of CCDs.
