Introduction
Physics explains almost everything that happen and how things happen around us. At the end of the 19th century scientists including Max Planck, Albert Einstein and others, changed how we see the universe in physics. These findings shows and explains the world of a very small.
This is going to be a small insight and explanation of a light (wave-particle duality) and the photoelectric effect. As every theory in physics, it is really important and, of course, interesting. Click ''play'' and get to know what it is, how it works and more!
Video:
Task
You will watch a video about light and photoelectric effect. After you will have a short test about the main facts and processes.
Answer according to the video! Listen carefully, pay attention and of course - ENJOY!
Process
QUESTIONS
- How is light also called?
- What kind of measurements describes a light?
- How both of these measurements interfere?
- What is the speed limit of the universe?
- What is the wavelength amplitude humans see the light?
- On what depends the ability for light to eject an electron form a surface?
- Who is the scientist that developed this theory?
- What is a photon?
- What kind of a formula explains the photon energy?
- What a light obeys?
Evaluation
ANSWERS
- Electromagnetic radiation
- Wavelength and frequency
- They are inversely proportional
- c=3*10^8 m/s
- From 400nm to 700nm
- Only on frequency
- Albert Einstein
- A particle of light
- E=hv
- Wave-particle duality
Conclusion
Now you know that a light is a wave and a particle at the same time and what is the photoelectric effect, but there still is so much fun things to know!
Thank you for your time and willingness to know our universe through physics better!
''Knowledge has a beginning, but no end.''
More physics explained by Dave here:
https://www.youtube.com/channel/UC0cd_-e49hZpWLH3UIwoWRA