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Waves Intro

TermDefinition
What do waves transfer? Energy
What can waves be? Longitudinal or Transverse
Which waves are parallel to the energy transfer? Longitudinal
Which waves are perpendicular to the energy transfer? Transverse
What type of wave are sound waves that travel through air? Longitudinal
What is wavelength ? The distance from a point on the wave to the equivalent point on the next wave
What is time period? The time taken for one complete oscillation
What is the equation of period? Period = 1 / Frequency
What is amplitude? The maximum displacement any particle receives from its undisturbed position
The shorter the time period of a wave... The higher the frequency
What happens when a wave is reflected? Reflection is the change in the direction of a wave that strikes the boundary between two different medias.
What is refraction? Refraction is a change in direction of light as it passes from one medium to another
Why does refraction occur? Refraction occurs due to the differences in velocity of the waves in different substances
Where is the normal construction line? The normal construction line is perpendicular to the reflecting/ refracting surface at the point of incidence
What are electromagnetic waves? Electromagnetic waves are transverse and transfer energy from a source to an absorber.
What do electromagnetic waves form? Electromagnetic waves form a continuous spectrum and travel at the same velocity through a vacuum or air
What do our eyes detect? Our eyes detect visible light (400-700 nm)
How are radio waves produced? Radio waves are produced by oscillations in electrical circuits
What happens when radio waves are absorbed? They create an alternating current with the same frequency as the radio wave itself.
What can changes in atoms and nuclei result in? Changes in atoms or nuclei can result in electromagnetic waves being generated or absorbed over a wide range of frequencies
Where do gamma rays originate from? They originate from changes in the nucleus of the atom
What are UV, X Ray and Gamma rays? They are ionising radiations and have a hazardous effect on human body tissue
What can UV rays do to skin? UV rays can cause the skin to age prematurely .
What can X Rays and Gamma rays cause? X Rays and Gamma rays can cause mutation of genes and cancer
How do you find wave speed? Wave speed= Frequency x Wavelength
What do longitudinal waves have? Areas of compression and rarefaction.
Created by: zaraakurt