Base in your questions that ask what cause the bright lines seen in the emission spectrum and i think the best answer to that is the H2 gas is used when protons was heated so the electron absorb all the photons and get exited and resulted by given of a light.
Interference if the hardest to remove due to the superposition of the frequencies of the radio waves
Howdy! I have your answer:
Scientific laws explain repeated observations that are experimental.
It also describes aspects of the universe.
~sofia
The spring should have a greater displacement .
Greater spring constant = the more difficult it is to stretch a spring , due to stiffness.
