Physics Flashcards
What is electromagnetic radiation
A spectrum of radiation with different frequencies,wave lengths and properties
What are the properties of a wave?
Wavelength,amplitude,frequency,crest and trough
How to Calculating wavelength?
λ = wave speed(v)/frequency(f)
What is light as a wave?
Light is a transverse wave,characterised by alternating electric and magnetic fields.
What is sound as a wave?
When an object vibrates, it causes movement in the particles of the medium
What is the structure of an ear ?
outer ear, middle ear and inner ear
What is the function of an ear
hearing and balance
What is reflection?
When light travels through one material bounces off a different material
What is refraction ?
The change in direction of a wave passing from one medium to another caused by its change in speed
What is Diffraction ?
Diffraction is the spreading out of waves as they pass through an aperture or around objects
What are the Properties of wavelengths through the Electromagnetic Spectrum?
velocity, amplitude, frequency, phase angle, polarization, and direction of propagation
What are the Uses of radiation across the Electromagnetic Spectrum?
Radio-television
Microwave-satellite
Infrared-thermal imaging
Visible light-photography
Ultraviolet-sterilising water
X rays-medical scans
Gamma rays -cancer detect
