Recent content by smitty8371

does anyone know the formula for matter mass density i know for photon density is row=8.36*10^-33 * T^4

i was but its the next question on my practice problem sheet

I was but the next part of my practice problem asks for a maximum wavelength for the previous problem

would the redshift be (1/1.268*10^-11)-1=z=about 7.88644*10^10 ok thank you i got the answer correct now then how would i go about finding the maximum wavelength

would the scale factor be 1.268*10^-11 honestly could someone just show me the work to do it i know no one here wants to hear that but it would help me tremendously so then i can just remember the steps on how to solve it

thanks i understand the concept of this its just where to put the numbers. I know that as the size decreases the temperature goes up that makes sense its the number crunching I am struggling with

so then where do i plug in the scale factor. Do i use it for z

the only issue I am having with this is i only know the past scale size and the current scale size and temp but those other equations need wavelength

are you saying use 1+z=a1/a2? sorry I am still really confused this is not a homework problem its just something i need to know for my test

Hi I am new to this site and I really need help I missed this class and of course my book doesn't have this formula so if anyone could tell me it that would be great. The temperature of the universe is now 2.725 K, and its scale size is 100 Mly. How hot was the universe when its length...