Flashcards
Physics 6 Electromagnetic Waves
Flashcards do conjunto (17)
- 1Name the 7 transverse waves in order from longest wavelength and lowest frequency to shortest wavelength and highest frequencyRadio waves ➞ Microwaves ➞ Infra-red radiation ➞ Visible Light ➞ Ultraviolet ➞ X-rays ➞ Gamma rays
- 2What do transverse do and were do they travel the same speed?They transfer energy and travel at the same speed in a vacuum
- 3Name the Wave ➞ They carry radio, tv and mobile phone signals and are also used in bluetooth. The danger of this wave is internal heatingRadio Waves
- 4Name the Wave ➞ They are used for satellite television and mobile phone signals you can also use this wave to heat food. The danger of this wave is internal heatingMicrowaves
- 5Name the Wave ➞ They are used in remote controls, optical fibres and scanners. The dangers of this wave is that they can cause skin burnsInfra-red Radiation
- 6Name the Wave ➞ They are used in cameras. The white light given out is a mixture of all the colours of the spectrum. The wave length decreases. Too much of this wave can cause damage to the eyes.Visible Light
- 7Name the Wave ➞ This wave is used in sunbeds, security marking and detecting forgery. It is given out by the sun but too much can cause skin cancer and blindness.Ultra- Violet
- 8What are radio waves and microwaves used for?Communications
- 9What are optical fibres?Thin glass fibres that transmit signals of light or infra-red
- 10Name two advantages of optical fibres?They carry more information ➞ they are more secure because the signal stays inside the fibre
- 11What does the Big Bang theory state?The universe started by a massive explosion from a small initial point. It has been expanding every since
- 12What is the main piece of evidence from the Big Bang?Cosmic Microwave Background Radiation
(CMBR) - 13What is the Doppler effect?The change in observed wavelengths. This change can be observed in sound , light (from galaxies) and microwaves.
- 14What is red shift?When the light from distance galaxies is shifted towards longer wavelengths because the galaxy is moving away from us
- 15What makes red shift more clear (greater)?The further away the galaxy is
- 16Fill in the missing word ➞ 'The ✵✵✵✵✵✵ a galaxy is moving the greater the ✵✵✵ ✵✵✵✵✵'Faster ✵ Red-Shift
- 17If most galaxies show red shift what does this tell us about the universe?The Universe is EXPANDING
Informações
- Descrição
- GCSE Physics FlashCards sobre Physics 6 Electromagnetic Waves, criado por Chloe Roberts em 10-05-2014.
- Criado por
- Chloe Roberts · mai 2014
- Atualizado
- 6 abr 2018
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