The uncertainty in the position of an electron along an x axis is given as 53 pm, which is about equal to the radius of a hydrogen atom. What is the least uncertainty in any simultaneous measurement of the momentum component px of this electron?
kg·m/s

To solve this problem it is necessary to apply the concepts related to the Heisenberg's uncertainty principle. Under this principle we understand the relationship that the minimum range of error in position (x) times the minimum range of error in momentum (p) is, at a minimum, about equal to the Planck constant, mathematically that is,

Replacing with our values we have,

Therefore the least uncertainty in any simultaneous measurement of the momentum component px of this electron is

frequency or wavelenth of em radiation in a vacuum

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.