Radiation Flashcards
Give an example of electromagnetic radiation.
Light
- The transmission of energy through space without physical connection through varying electric and magnetic fields is called _______ radiation
Electromagnetic
The distance between successive crests on a wave is known as its’ what?
Wavelength
The number of wave crests that pass a given point per second is known as what?
Frequency
What are the colors of the visible spectrum?
Red, orange, yellow, green, blue, violet
Do electromagnetic waves need a medium to travel through?
No
How fast do electromagnetic waves travel in space?
Speed of light
Put the following in the correct order on the electromagnetic spectrum: Visible light, Gamma rays, Infrared, X rays, Radio, Ultraviolet
Radio, micro, infrared, visible, ultraviolet, X-rays, gamma rays
How does the opacity of the atmosphere affect certain radiation that comes through it?
By absorbing and reflecting certain waves
All thermal motion ceases to move at what degrees Kelvin?
0° k
Water freezes at what degree Celsius?
0°c
Convert the following to Kelvin.
0°C __ -50°C __
90°C __ -20°C __
Celsius + 273
Convert the following to Celcius.
100°K __ 200°K __
273°K __ 350°K __
Kelvin - 273
Define temperature.
The speed at which molecules move
What happens to an objects temperature on the Blackbody spectrum as an objects radiation shifts towards higher frequency and greater intensity?
The temperature rises
The thermal radiation laws state that the energy emitted is proportional to what power of the temperature?
4th power
If one is moving toward a source of radiation, what happens to the wavelength? What color shift would you observe?
Blue shift, wavelength would become shorter
If one is moving away from the source of radiation, what happens to the wavelength? What color shift would you observe?
Red shift, wavelength would become longer
This effect is known as what?
Doppler
If we are observing a star in the sky and observe that its color is blue on the visible light spectrum, what can we say about the age of the star and the amount of radiation emitted?
Young star, temperature is very hot