What are electromagnetic waves?
Electric and magnetic disturbances
What do all electromagnetic waves do?
Travel as waves
transfer energy from a source to an absorber
How do all electromagnetic waves travel?
Travel through a space (vacuum) at the same speed
different wavelengths and frequencies
What is electromagnetic spectrum?
All of the waves together
group according to wavelength and frequency
Name electromagnetic spectrum
longest wavelength to shortest wavelength
- Radio waves
- Visible light
- Gamma ways
What is wavelength of radio waves?
Wavelengths up to 104m
What is wavelength of gamma rays?
Wavelengths as short as 10-15m
What is the spectrum?
How is different parts of spectrum are not precisely defined?
Frequencies and wavelengths at boundaries
What happens to different wavelengths of electromagnetic radiation?
or transmitted differently by different substances and types of surface
What happens the higher the frequency of electromagenetic wav
The more energy it transfers
What wave speed do all electromagnetic waves travel through space/vacuum?
300 million m/s
How to calculate wave speed?
v = f * λ
v = wave speed m/s
f = frequency , N
λ = wavelength , m