Waves and Radiation Flashcards
What is a Wave?
A wave is a term used to describe how energy is transferred from one point to another
What is wavelength?
Wavelength is the length of one full wave
What is the frequency of a wave?
The frequency is the number of waves that pass a point in one second
What is the amplitude of a wave?
The amplitude of a wave is the distance from the rest point to a crest or trough
What is the period of a wave?
The period of a wave is the time it takes to complete one full cycle
What are the two types of waves called?
Transverse and longitudinal
Describe a transverse wave?
In a transverse wave the vibrations occur perpendicular to the direction of the wave.
Describe a longitudinal wave?
In a longitudinal wave the particles vibrate in the same direction as the wave is travelling
What is the speed of all electromagnetic radiations?
3 X 8 10^8m/s
What are the four properties that identify waves?
Reflection, Refraction, Interference and diffraction
When does reflection occur?
Reflection occurs when a wave strikes a barrier and is reflected off that barrier.
When does refraction occur?
Refraction occurs when a wave changes speed as it moves from one medium to another?
When does interference occurs?
Interference occurs when two or more waves combine
Explain diffraction?
When waves pass by a barrier or by an edge or through a gap they spread or bend behind the barrier this is know as diffraction.
What are the parts of the electromagnetic spectrum?
Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays
What part of the electromagnetic spectrum has the longest wavelength?
Radio waves