Spectroscopes Flashcards
How are spectroscopes similar to prisms
They both Split light
How can astronomers use the colour of a star when looking through a spectroscope to gain information about it
They can tell what the star is made of
How does the size of the current through a light bulb filament relate to its temperature
More current makes the filament brighter and hotter
How does the temperature of the filament relate to its colour
Cooler temperatures will be red and the hotter it is the closer to white and eventually blue
What is the order of the colours from coolest to hottest
Red, orange, Yellow, Yellow/white, white, white/blue, blue
What are the seven spectral classes from hottest to coldest
O B A F G K M
<—————–>
Hot Cold
What spectral class does our sun belong to
Type G
How could a relatively cool star appear brighter than hotter star even when they are equal distances apart
Blue stars are extremely hot but are not as bright due to a the majority of the light being Ultra violet. Stars can also be blocked by Dust clouds thus reducing brightness
