How light acts as a wave and particle (part 1) Flashcards
waves that consist of vibrating electric and magnetic fields. Like other waves, electro-magnetic waves transfer energy from one place to another.
electromagnetic waves
The transfer of energy by electromagnetic waves is called
electromagnetic radiation
The magnet exerts magnetic force over an area all around it.
this area is called a magnetic field
Electromagnetic waves may:
- reflect, or bounce back from a surface;
- refract, or bend when entering a new medium;
- diffract, or spread out around obstacles.
commonly called light, is the transfer of energy by waves called electromagnetic waves.
Electromagnetic radiation
We now call such a packet of energy a:
photon
This theory states that electromagnetic energy is released in discrete packets of energy—now called photons—that act like waves.
wave-particle theory of electromagnetic radiation
about 300 million meters per second (3.0 x 108m/s)
speed of light
the distance between corresponding points of adjacent waves
wavelength
the number of waves that pass a fixed point in a given amount of time
wave frequency
The speed of a wave is a product of its:
wavelength and frequency
Visible light and infrared light are just a small part of the full range of electromagnetic radiation, which is called the:
electromagnetic spectrum.
electromagnetic waves with the longest wavelengths
radio waves
stands for amplitude modulation
AM
sound signals are encoded by changing the am-plitude, or maximum height, of radio waves.
AM broadcasts
stands for frequency modulation.
FM
Sound signals are encoded by changing the frequency of radio waves
FM broadcasts
an electromagnetic wave with a relatively long wavelength and low frequency.
microwave
stands for radio detection and ranging
radar
Light with the longest wavelengths is called:
infrared light
The term infrared meanS:
“below red.
The only light that people can see is called:
visible light
Light with wavelengths shorter than visible light is called or he range of light waves that have shorter wavelengths and higher frequencies than violet light in the visible range of light.
ultraviolet light
the term ultraviolet means:
“above violet.”
extremely energetic electromagnetic waves and shortest wavelengths and highest frequencies of all electromagnetic waves
gamma rays
includes all the wavelengths of light that the human eye can detect
Visible light
Producing light without heat is called:
luminescence
