PHYSICS - The Universe Flashcards
What process allows the light going in a prism, split into its different colours?
Refraction/Diffraction
What are the 3 types of spectra?
- Continuous Spectrum
- Absorption Lines
- Emission Lines
What is continuous spectrum?
Where light source has been split into its different colours
What is absorption lines?
When light is emitted from a source and pass through a gas
What is emission lines?
When a gas is heated enough that it gives off its own light
It produces an emission spectra (flame tests)
Why do we get (Fraunhofer) lines in spectra?
I’ll supposedly remember this later?
abd says:
absorbed due to certain wavelengths
^ that ig?
Look at page 3 (I can’t read his writing)
Aw man what the
But i mean it’s similar to “3 types of spectra”
What’s important info about spectra lines?
Unique for each different element.
Thus, they can be identified easily
What causes dark/bright fringes in a spectrum/spectra???
Electrons absorbing/emitting wavelengths
Look at page 5, very useful
Preciate it
What was the red shift?
- Lines moved towards “red spectrum” (increased wavelength)
- Due to stars further away, higher wave length lower energy
Explain Doppler Effect
- When sound move towards you, it’s louder and higher pitch (wavelength of sound shorter)
- When sound moves away from you, it’s quieter and lower pitch (wavelength of sound longer)
What conclusion did Hubble draw from doppler effect and his observations?
Redshift causes by doppler effect but with light waves
The greater the red shift….?
The faster it is moving away from us
&
The further away it is from us
You can look at page 15 if u want
Ok I guess
