-
What are the various types of electromagnetic radiation?
Gamma Rays, X-Rays, Ultraviolet light, visible light, infared radeation, microwaves, and radio waves
-
What do spectral lines show
Spectral lines identify the elements present and the star's chemical composition
-
What is the doppler effect used to determine
It is used to determine whether or not a star or other body in space is moving away or towards earth
-
Electromagnetic spectrum
The arrangment of light waves according to their wavelegnth and frequencies
-
Photon
Small particles of light that exert force
-
Spectroscopy
The study of the properties of light that depent on wavelegnth
-
Continuous Spectrum
An uninterupted band of color
-
Absorption Spectrum
When visible light is passed through a relativley cool gas under low pressure, where some of teh colors are observed
-
Emission spectrum
Produced by hot gas under low pressure, series of bright lines of particular wavelegnths. Each element or compond in its gaseous form produces a unique set of spectral lines
-
Doppler Effect
The perceived change in wavelegnth of a wave taht is emitted from a souce that is moving away or towards an object.
- Towards: waves are squished, appearing bluer
- Away: waves are stretched, appearing redder
-
Name the four parts of the sun
The solar interior, the visible surface/photosphere, two atmosphering layers (chromosphere and corona)
-
Why do sunspots appear dark
They are a lot colder than the surronding solar surface
-
What are prominences
Promeninces are ionized gases trapped by magnetic fields that extend from regions of intense solar activity
-
What form of energy do solar flares release
Unltraviolet redio and xray
-
What happens in nuclear fusion
Elements are fused together. Some energy is released because some matter is converted into energy
-
Photosphere
Layer that radiates most of the sunlight we see, the "surface"
-
Chromosphere
Above the photosphere, not visible., produces an emission spectrum reverse of absorption spectrum of photosphere
-
Corona
The outermost portion of the solar atmosphere, very weak.
-
Solar Wind
Stream of particles and proton s and electrons taht travel outward through the solar system
-
Sunspots
Dark regions on the surface of the photosphere
-
Prominence
Cloudlike structures consisting of chromospheric gases. Ionized gasses trapped by magnetic feilds
-
Solar flares
breif outbusts of energy at a sunspot clustre releasing unltraviolet radio and xray radiation. Fast moving atomic particles are ejected
-
What does a prism do
Seperates the visible light into may colors by bending each wavelegnth at a different angle
-
What color has the longest wavelegnth
Red
-
Star's spectrum can tell astronomers ..?
the stars chemical composition
-
Which type of spectrum does the radiation from most stars produce
Absorption spectrum
-
What does the use of doppler effect tell astronomeers about a star
Whether a star is moving away or towards Eart
-
What spectrum does an incandescent lightbulb producse
Continuous spctrum
-
What happens at the core of the star
Nuclear fusion
-
Streams of electrons and protons that shoot out from the sun's corona are the solar....?
wind
-
Sunspots appear darker on the sun's surfaace because
They are coler than the rest of teh surface
-
What is the effect of solar flares on earth
Creates auoras
-
When the sun produces energy, it consoumes hydrogen and produces
Helium
-
The sun can countinue to exist in its present stable state for another
5.5 billion years
-
why is an understanding of light importatnt to astronomers
Almost everything we know about the univesre is about light
-
The arrangment of electromagnetic waves is called the
alectromagnetic spectrum
-
THe nature of light
Particles and waves
-
Particle of lights are called
photons
-
how are frequency and wavelegnth related
shorter wave higher frequency
-
Electromagnetic radiation travels at the speed of
light
-
WHo was the first astronomer to have used telescopes for asttronomical obsercations
Galeleo
-
The grainy appearance of the sun's surface is due to moving columns of gas called
granuales
-
the halo like area around the sun's disk that is visible during a solar eclipse is the
corona
-
ENergy is transmetted inside the sun through
Convection and radiation
-
The sun's atmospher consists of the corona and the
chromosphere
-
The number of sunspots increases and decreases in a cycle of
11 years
-
The sun's energy is created in the area in and around its
core
-
Spectroscopy is the study of the properties of light taht depend on
waveleghnth
-
When a wave source ismoving toward or away from an object, the wavelegnth changes, a phenomenon knowh as the
doppler effect
-
HOw do astronomers determine whether stars are moving towards or wau from earth
Doppler Effect/REd-blue shift
|
|
