The unified physical picture of the world and the progress of physics
Answers are for parents and teachers.
1
Sunlight takes 500 s to reach the Earth. What does this fact say about the idea of “instant interaction”?
It shows that interaction spreads with a finite speed.
2
State two differences between the mechanical and the electromagnetic pictures.
In the electromagnetic picture matter can also be a field and interaction spreads with finite speed.
3
Name three fields developing in the 21st century.
Information technology, biophysics, nanotechnology.
4
Write which branch of physics plays a role in one modern device you know.
For example, in a camera optics (lenses), in a solar panel light energy.
5
What does studying physics give in everyday life? Give two examples.
For example, safe use (electricity, heat) and understanding devices (spectacles, cameras).