If the entropy, S of a black hole is proportional to the area of the horizon, A, then, what about an observer moving with a constant velocity, v with the BH? Another observer moving with a constant acceleration with respect to the BH?(adsbygoogle = window.adsbygoogle || []).push({});

After all, entropy is an invariant but area is not. So, isn't this a problem?

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

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

# Holographic principle

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