Lesson 1: The Universe Flashcards
(17 cards)
What do we use the electromagnetic spectrum for?
to determine the age of stars, speed at which objects are travelling towards or away from earth, and the distance between objects and space.
What do we use scientific notation for?
To condense very large or small numbers into a more manageable size
Subatomic + fundamental particle
Important to understand the process of fusion and the fundamental forces of the universe
Radiation is the emissions of what?
Energy
Four types of radiation
Electromagnetic
Particle (radioactivity)
Acoustic (sound)
Gravitational
What natural electromagnetic radiation are being exposed to in the everyday life?
The Sun
Radioactive isotopes in earth crust
Other celestial objects
The electrical spectrum is a range of electromagnetic wavelength that includes:
Radio waves, x-rays, microwaves, radiation heat, visible light, ultraviolet light, and gamma rays
Electromagnetic waves have what three important characteristics?
Speed
Wave length
Frequency
Does the speed of EM radiation change?
It never changes
The speed of EM radiation
Always the speed of light which is 3x10(8)
The wavelength and the frequency are opposite to one another. what does this mean?
This means as one value gets larger than other gets smaller.
Subatomic particles are what make up atoms. Which is what?
These are protons, neutrons, and electrons
Fundamental particles are what make up protons, neutrons and electrons. These are what?
Quarks and leptons
What is a key characteristic of fundamental particles?
They have no internal structure
Electron field
Leptons
Higgs Field
Higgs Boson
electromagnetic field
Photon
