Origins+of+the+Universe

Origins of the Universe

 Need help with understanding on how to use a spectroscope? The Document below helps you understand how to use a spectroscope & determine the wavelengths of different colours of diffracted/split light. media type="custom" key="3524502" **__Big Bang time line:__** ** this timeline shows things that happened starting from Big Bang all the way to the first living cells on Earth. To pause a particular slide, move your mouse on to the sideshow & it will pause. NOTE: 10-6 is a big

decimal number that has been written in an index form to make it shorter. It means one millionth of a second. Its normal form can be written like this: 0.000001. -6 represents the amount of zeros there is before 1.** posted by Ben Khabib. media type="custom" key="3488688"
 * NOTE: useful presentation on the "light" topic is on the "light" page. Visit for info on light, absorption, UV rays, sunblock & sunscreen. **

Refer to Balkaran's light study terms on light revision notes page. =**REVISION FOR YOU BY BALKARAN MANN:**= Hello everyone Balkaran Mann here are some revision notes for you: 1)What is redshift? Well redshift is used to state that most of the stars are moving away from us and their spectrum is towards the red end of the light spectrum so therefore they produce light of a longer wavelength. To make it more clearer for you: the energy that a star emits travels in the form of light waves and if the star wasn't moving away or closer to us its frequency and wavelength would be of normal length. However most of the stars'frequency and wavelength is longer (therefore the light spectrum is towards the red end, thats why it is called redshift) and due to that the stars are moving away from us. Here are some videos to help you out: media type="youtube" key="Man9ulEYSgk" height="344" width="425" media type="youtube" key="FhfnqboacV0" height="344" width="425"

2) What is blue shift? well in accordance to the Doppler effect and the red shift, the object (say a star) is moving towards us as its light is towards the blue end of the light spectrum and this means that the frequency and wavelengths are much shorter and therefore indicates that the object is moving towards us.