Karteikarten
waves and em waves
Karten in diesem Stapel (29)
- 1what do waves transfer?energy
- 2how do vibrations move in a transverse wave?move perpendicular or right angle to the direction the waves travelling
- 3give an example of a transverse wavewater waves or electromagnetic
- 4how do vibrations move in a longitudinal waveback and forth in the same direction the wave is travelling
- 5what is it called when longitudinal waves squish together and move apartcompressions and refractions
- 6give an example of a longitudinal wave?sound wave or seismic p wave
- 7try give both equations for wave speed?v= x over t
{ wave speed = distance divided by time}
OR
v=f x wavelength
{ wave speed = frequency x wavelength} - 8what is the amplitudemaximum movement of a wave from its rest position
- 9whats the wavelengththe distance from one point on a wave to the same point on the next wave
- 10whats the frequencynumber of waves passing a point per second
- 11what is the periodtime taken for one complete wave to pass a certain point
- 12what are radio waves used for?tv and radio signals for communication
- 13a danger of radio waves?if exposed to LARGE amounts the high frequency can cause cancer
- 14Use of microwaves?to cook food or to transmit mobile phone signals
- 15how do microwaves cook food?heats water particles in the food increasing there temperature which cooks the food
- 16what are the dangers of microwavesthey can heat the bodes cells or tissue causing damage to them
- 17what is ir radiation given out byall hot objects
- 18what is in fared used in?infared cameras to detect infared radiation which is called thermal imaging
- 19what is thermal imaging useful forlooking at where a house may be losing heat energy
- 20where else can in fared be used?security sensors
- 21dangers of in fared?can caused burns to skin as its hot
- 22what is visible light used for?photography and cameras
- 23what does the photographic film in cameras react to causing it do bounce of objects?visible light
- 24what is ultraviolet light used for?clean water by killing bacteria, security to detect forged bank notes or passports
- 25dangers of uv lightcauses sunburn , skin cancer and damage to eyes
- 26use of x rayto see internal and bones and used at airports as security for bags
- 27dangers of x raydamage cells causing mutations which cause cancer
- 28uses of gamma raysused to sterilise medical equipment and used in cancer treatment
- 29danger of gamma raysdamage cells can kill them and may cause mutations leading to cancer
Informationen
- Beschreibung
- physics Karteikarten am waves and em waves, erstellt von hollie gould am 12/02/2018.
- Erstellt von
- hollie gould
- Aufrufe
- 0
- Bewertung