what does plank constant refer to or mean..please ....?

Answer 1

Max Planck was the dude who came up with this. 4.3 \times 10^{17} s ) would be roughly 8 \times 10^{60} Planck times. It's also referred to as a minimum. Same with Planck legnth: roughly equal to 1.6 x 10-35 m or about 10-20 times the size of a proton. Planck time is measured to how long it takes light to reach Planck Lenght. I'm 13 and I know that. Also it's beause i'm foreign. Foreigners are smart

Sean
Merry XMAS

Answer 2

Planck's constant (denoted h) is a physical constant that is used to describe the sizes of quanta. It plays a central role in the theory of quantum mechanics, and is named after Max Planck, one of the founders of quantum theory. A closely-related quantity is the reduced Planck constant (also known as Dirac's constant and denoted \hbar, pronounced "h-bar"). Planck's constant is also used in measuring energy emitted by light photons, such as in the equation E=hν, where E is energy, h is Planck's constant, and ν (Greek letter nu) is frequency.

Planck's constant and the reduced Planck's constant are used to describe quantization, a phenomenon occurring in subatomic particles such as electrons and photons in which certain physical properties occur in fixed amounts rather than assuming a continuous range of possible values.

Answer 3

There is no easy answer to this.
It depends on the level of knowledge which you would like to glean from this constant. In its very basics it is the quantum of the action, the fundamental volume of phase space, the limit of resolution of information etc.