Waves (study better deck in other Physics folder) Flashcards
What is the equation for wavespeed?
Frequency x wavelength
How is the wavelength measured?
From the crest to the crest
In A transverse way what way is the vibration?
90 degrees to direction of energy
In which type of wave do the vibrations got in the same direction as the energy?
Longitudinal
What type of waves are electromagnetic waves?
Transverse
When is there maximum diffraction?
Gap same as wavelength
What are the em waves in increasing frequency?
Radio waves Microwaves Infrared Visible light Ultraviolet X-rays Gamma rays
What are radio waves used for?
Communications
Diffract around curved surfaces
What are microwaves used for?
Satellite communications
Pass easily through the atmosphere without being absorbed
How do microwaves cook food?
Absorbs water molecules
How is infrared radiation used in heating?
Given out by heaters
The hotter the object the more radiation
Light signals can travel through …………………
Optical fibres
For communications
What wave is used for photography?
Visible light
How does a fluorescent light work?
Ultraviolet radiation is absorbed and then visible light is emitted
How does an X-ray work?
X-ray radiation is directed through the object to a sector plate
The bits where fewer x- rays get through are brighter
