It's the "objective" lens ... the big one in the front.
One side of the wave changes speed before the other side, causing the wave to move
Answer: option B
Explanation: when a neutral atom loses an electron or gains a positive charge electron, it becomes a positive ion (positively charged) and when an neutral atom gains an electronic charge or losses a positive charge electron, it becomes a negative ion (negatively charged).
Speed of light
According to Einstein, the speed of light is constant in all points of reference. In addition, he pointed out the speed of light is the maximum speed known since in practice one can never catch up with the beam of light. This is explained by his theory of relativity.
Answer:
b.
Explanation:
It's b I sis thebksqjwnsx0qkqnsnd991isnd
