deck 1 Flashcards
(17 cards)
some types of waves are longitudinal. This means that the Oscillations are…?
The same Direction as the direction of travel and energy transfer.
What’s the definition of the oscillations light waves?
perpendicular to the direction of energy transfer
what is the equation for wave speed?
Wave speed = frequency x wavelength
what are the units of frequency?
Hz
The distance from the crest of one wave to the crest of the next wave is called what?
Wavelength
What is CMBR?
Cosmic Microwave Background Radiation
According to the Doppler effect, what happens to sound waves emitted at a constant pitch from a car moving towards you?
Their frequency increases, so their pitch increases
why is the light from distant galaxies red shifted?
They are moving away fro us
About how long ago do Scientist believe the universe began?
13, 700 million years ago
What planet did Viking 1 and 2 land upon?
Mars
What advantage do space probes have over other types of space flight?
Astronauts are not needed
What evidence is there for the big bang?
Red shift- it is a change in frequency of light that we can see from a distant star
What is thought to be left over from the big bang which gives proof that it happened?
Microwaves
What are the two final stages in the life cycle of a large star?
Neutron Star or Black hole
what follows a white dwarf star in the life cycle of a small star?
Black Dwarf
What is a Galaxy made from?
Millions of stars
What will the next stage in our suns life cycle be?
Red giant
