Answer:
Explanation:
In the early 1800s (1801 to 1805, depending on the source), Thomas Young conducted his experiment. He allowed light to pass through a slit in a barrier, so it expanded out in wavefronts from that slit as a light source (under Huygens' Principle). In turn, that light passed through the pair of slits in another barrier (carefully placed the right distance from the original slit). Each slit, in turn, diffracted the light as if they were also individual sources of light. The light impacted an observation screen. This is shown to the right.
When a single slit was open, it impacted the observation screen with greater intensity at the center. It then faded as you moved away from the center. There are two possible results of this experiment:
Particle interpretation: If light exists as particles, the intensity of both slits will be the sum of the power from the individual slits.
Wave interpretation: If light exists as waves, the light waves will have interference under the principle of superposition, creating bands of light (constructive interference) and dark (destructive interference).
B, A, C, A (this last one I am not positive about)
Temperature has a direct effect on whether a substance exists as a solid, liquid or gas. Generally, increasing the temperature turns solids into liquids and liquids into gases; reducing it turns gases into liquids and liquids into solids.
Answer: She was discrete, effective, and courageous in her work as a spy.
Explanation:
Harriet Tubman was very effective and courageous in her work as a spy. She was a nurse, who doubled as a spy. The spy worked led her to the Underground Railroad. This opportunity of working with the Underground Railroad granted Tubman intelligence to all the important rail and water routes in her territory.
She helped to free slaves who became loyal to her and were willing couriers in her spy work. At a time, she personally was at the forefront of some raids in South Carolina. Due to these involvements in spy work, she struggled financially and was eventually, denied pension.
Answer:
Hope this helps!!!
Explanation:
I bolded what I renewed/answer!
1. We (knew) each other since we were at school.
2. They (played) tennis every Sunday for years.
3. I (did not play) tennis.
4. You don't understand because you (did not listen).
5. How long have you been learning English? (Complete sentence change!)
6. You read the book yet?
7. I ate dinner, so let's go out.
8. I read the book you recommended but I'm not finished.
9. She finished her work already.
