Flashcards
EBIs: Waves
Flashcards do conjunto (13)
- 1Analogue signal processingConverted into currents and voltages that vary constantly
- 2Digital signal processingConverted into a sequence of numbers (binary)
- 3Advantage(s) of digital signalOriginal signal can be recovered from one affected by noise and data is more easily processed
- 4Microwave heats food faster because..The food molecules absorb the microwaves and the energy they transfer. They vibrate faster which makes them hot. Food is heated throughout, not just outside like a conventional oven.
- 5Function of ozone layerAbsorbs UV radiation which helps reduce the risk of skin burn and skin cancer. UV can also be harmful to eyes in excess.
- 6As the wave front gets larger...The energy at any point in the front of the wave must get smaller
- 7Smaller wavelength through a gap of slightly bigger sizeLess diffraction because wavelength is smaller
- 8Comparing X Rays and Infrared: passing through materialIR can only pass through specific materials, while X rays can pass through soft materials. (they also can't be physically felt, unlike IR, which is felt as heat)
- 9Uses of gammaradiotherapy, sterilizing food and medical equipment
- 10Features of a mirror imageIt is virtual (can't be produced on a screen), L and R are reversed (called inverted), same distance from mirror as the original object.
- 11Strength of a certain type of wave may depend onits frequency and wavelength. (EG infrared from TV remote isn't dangerous because of its f. and wl.)
- 12Used to see inside a body and perform keyhole surgeryEndoscope
- 13Affect of wind on soundNone.
Cancelled out in echoes when sound travels in one direction as it approaches, and the opposite direction as it returns.
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- GCSE Physics (Waves) FlashCards sobre EBIs: Waves, criado por Carolina Nina Matos em 27-10-2016.
- Criado por
- Carolina Nina Matos
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