Astronomy
The speed of light in a vacuum is:
300,000 km/s
What wavelengths of light can the human eye see?
380 nm to 750 nm
Light with a wavelength of 600 nm has a frequency of:
5 x 1014 Hz
Which formula denotes how the speed of light c is related to its wavelength λ and frequency f?
c = lf
An emission line is produced when an atom absorbs a photon of a specific energy. T/F
false
Which of the following lists different types of electromagnetic radiation in order from the smallest wavelength to the largest wavelength?
gamma rays, ultraviolet, visible, infrared, radio waves
A radio photon travels slower than a gamma ray photon. T/F
False
A thin cloud of cool gas on top of a hotter blackbody will radiate an emission spectrum. T/F
False
The period of a wave is inversely proportional to the frequency of that wave. T/F
True
How does the speed of light traveling through a medium (such as air or glass) compare to the speed of light in a vacuum?
It is always less than the speed of light in a vacuum.
How do the wavelength and frequency of red light compare to the wavelength and frequency of blue light?
Red light has a longer wavelength and lower frequency than blue light.
If the wavelength of a beam of light were to double, how would that affect its frequency?
The frequency would be two times smaller
What is the difference between visible light and X-rays?
Wavelength; X-rays have a shorter wavelength than visible light.
If you observe an isolated hot cloud of gas, you will see:
an emission spectrum
If the frequency of a beam of light were to increase, its period would _________ and its wavelength would _________?
decrease; decrease
As wavelength increases, the energy of a photon _________ and its frequency _________.
decreases; decreases
The color of visible light is determined by its
wavelength