Explanation: all the continents on Planet,'Earth':
1. Africa,
2.south America,
3.Antarctica,
4. Asia,
5.Australia,
6. Europe.
7.north America
I think is are both constructive and destuctive
Answer:
Explanation:
Close encounters tend to disrupt orbits. So that is retrograde motion. Astronomers use the term to refer to the occasional backwards motion of the planets as seen in Earth's sky. When used in this way, retrograde motion is entirely an illusion caused by the moving Earth passing the outer planets in their orbits.
The type of electromagnetic radiation that cannot be focused are x-ray and gamma rays. The photons connects with other photons and not surfaces. When a photon hits an atom it can distribute to any direction. The only way to limited both types of electromagnetic radiation would be through interference.