(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

1) Calculate approx. how many Cosmic Microwave Background-photons that you would absorb per second if you were in space.

3. The attempt at a solution

Ok, I know that the CMB-photons fit with a blackbody spectrum with T = 2.725 K. So the total amount of photons I find by using

n = beta * T^3, where beta = 2.03*10^7 m^{-3} * K^{-3}.

This is the amount of photons per cubicmeter, which is also the amount that would pass through my body (assumed spherical) per second.

Am I correct?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Astrophysics - How much CMB-photons do you absorb per second

**Physics Forums | Science Articles, Homework Help, Discussion**