Diego Study Science
Terms in this set (40)
What is an electromagnetic wave?
A wave that doesnt need a medium to travel and transport their energy
What is the relationship between wavelength and energy in a wave?
More energy in the wave, the shortest the wavelength.
What describes the transfer of energy as electromagnetic waves?
Electromagnetic radiation, like light, radiowaves and X-rays.
What is the full length of wavelengths of EM Waves Called?
What are the 7 Spectra?
Radio, Micro, Infrared, Visible, UV, Xray, Gamma,
What are the highest frequency and lowest frequency
Highest (the far right of the spectrum= Gamma, Xray)
Lowest (the far left of the spectrum= Radio, Micro...)
How fast do different parts of the EM Spectrum travel in vacuum?
300 million meters per second
Which of the 7 Spectra does the sun emit?
All. The sun is the Earths major source of energy.
If you wanted to detect X-Rays coming from the sun where would you place the detector?
Outside our atmosphere . In orbit around Earth because X-rays are absorbed by the atmosphere.
What prevents most of the suns gamma rays from reaching us on the surface of the Earth??
What is white light?
A combination of lights different wavelengths in the electro-magnetic field.
What is a photon? How it is related to visible light?
A dot of energy. Its related to visible light because it is a fundamental particle to visible light and all EM waves consist of photons.
What are the colors that make up white light?
Which color of light has the longest wavelength and which the shortest ?
What is a prism and how does it split white light into its parts?
Clear triangular device that made out of plastic or glass, that when white light goes through the light bends due to the phenomenon called refraction.
How are rainbows created?
A Rainbow is created by the dispersion and refraction of light. White light enters raindrops from the sun and gets dispersed and refracted inside the raindrops.
Is it possible to find the end of a rainbow?
No, because its an optical illusion
What are spectroscopes and what are they used for?
A device used to measure spectrum of light. To measure properties of light over a specific portion of the electromagnetic spectrum.
What two wave behaviors allow for scientist to separate white light into its parts
Refraction and Defraction.
Why does the grass look green and a car look red when you look at it.
Because the color is reflected off the object to our eyes and the other colors are absorbed by the object.
Properties of light
Reflection, speed, refraction, dispersion, diffraction
reflects light off surfaces
speed of light is the fastest
Light bends when it passes from one medium to another
ability to break white light into its constituent colors
light bends as it goes through an opening
Have the longest wavelength of all EM waves and is used to transmit data.
Radio, satellites and radar
Sources of Radio Wave
Shorter wavelength than radio wave, used to cook food and transmit info
Microwave wave sources
atoms, molecules, devices like microwaves
type of EM that is invisible radiant energy
Infrared wave source
Portion of the EM spectrum that is visible to the human eye
Visible radiation sources
Fluorescent and incandescent devices, sun
Not visible to the human eye
Sources of ultraviolet radiation
light bulb, crackling fire, stars
Shorter wavelength than UV rays. They can penetrate soft tissue and are used in medicine
Sources of Xrays
Pulsars, galactic supernovae, X-ray tubes, stars
More energy, smallest wavelength, highest frequency
Sources of gamma-ray radiation
neutron stars, lightning, radioactive decay, pulsars, nuclear explosions