Ch 4 Section 1 Flashcards
Visible light is a kind of
Electromagnetic radiation
Together all the forms of electromagnetic radiation form the
Electromagnetic spectrum
Wavelength is the distance between
Corresponding points on adjacent waves
Significant feature of wave motion is its
Rewriting nature which can be characterized by wavelength and frequency
Unit for wavelength
Distance unit (m, cm, nanometer)
Frequency (v) is defined as the number of
Waves that pass a given point in a specific time usually one second
Frequency unit
Waves per second (hertz)
Frequency and wavelength are
Mathematically related to each other
C = wavelength times frequency
In wavelength frequency equation c is the
Speed of light
In wavelength frequency equation wavelength symbol is the
Wavelength of the electromagnetic wave in m
In wavelength frequency equation v is the
Frequency of the electromagnetic wave in s^-1
In wavelength frequency equation the product is a
Constant
Wavelength is
Inversely proportional to v
As wavelength decreases
Frequency increases
The photoelectric effect refers to the
Emission of electrons from a metal when light shines on the metal
Wave theory of light predicted that light of any frequency could supply enough
Energy to eject an electron
A quantum of energy is the minimum quantity of
Energy that can be lost or gained by an atom
Max Planck proposed the following relationship between a quantum of energy and frequency of radiation:
E = hv
In equation E = hv, e is the
Energy in joules of a quantum of radiation
In equation E = hv, v is the
Frequency in s^-1 of the radiation emitted
In equation E = hv, and h is a fundamental
Physical constant known as plancks constant
Plancks constant
6.626 x 10^-34 J • s
Einstein introduced idea that electromagnetic radiation has a
Dual wave particle nature
Electromagnetic radiation is a form of energy that exhibits
Wavelike behavior as it travels through space
A photon is a particle of electromagnetic radiation having
Zero mass and carrying a quantum of energy