Ch 5 study guide Flashcards
What is light?
A form of energy
Electromagnetic spectrum
form of energy that exhibits wave-like behavior as they move through space
Speed of light formula
3.00 x 10^8 m/s
Visible Light
The segment of the electromagnetic spectrum that the human eye can view
Different colors have different ________ therefore different _________.
wavelengths; frequencies
Violet= 400nm wavelength, ________ frequency
high
Red= 750nm wavelength, ________ frequency
low
photon
particle of electromagnetic radiation that has 0 mass and carries a quantum of energy.
photon energy is _______ (directly/inversely) proportional to frequency
directly
wavelength
the distance between successive crests (nm), distance wave travels in one full cycle of upward and downward motion
frequency
how fast it is moving up and down per second
speed
regardless of wavelength, light moves through space at a constant speed
wavelength and frequency are __________ (directly/inversely) related
inversely
quanta
the minimum quantity of energy that can be gained or lost by an atom.
photoelectric effect
a phenomenon that occurs when the light shined onto a metal surface causes the ejection of electron from that metal.
______ (color) is incapable of releasing electrons from sodium. metal.
red
_______ even if relatively faint, releases electrons easily.
violet
Why does violet light free electrons from sodium but red light does not?
violet has a higher frequency than red light. Higher frequency higher energy.
dual nature of light
light has both wave-like and particle-like behavior.
Atomic emission spectrum
a spectrum, in general, is a range of wavelengths of the electromagnetic spectrum.
when atoms are given a specific amount of ______ the electrons absorb that ________.
energy; energy
quantum
the specific amount of energy an electron can absorb
with _________ ________ the electron can jump to a higher energy level
quantum energy
energy is released in the form of __________ ________
photon light
