How can the Planck length and the speed of light both be universal constants? Will the Planck length change depending on your frame of reference? :)
Planck length is based on 3 constants, none of which change due to speed [tex]\ell_{p}=\sqrt{\frac{\hbar G}{c^3}[/tex] Since [tex]\hbar[/tex] , G, and c are all constants, planck length also remains constant