abeka chemistry 11 sections 7.1

wave

wave

periodic back-and-forth motion that transmits energy

crests

high points of a wave

troughs

low points of a wave

wavelength

the distance between two corresponding points on successive waves

amplitude

measure of a wave’s strength; half of the vertical distance between a crest and a trough

frequency

number of complete waves that pass by a point in a given time

f

what’s the symbol for frequency?

hertz

SI unit of frequency

hertz

equal to one wave (or cycle) per second

hz

what’s the symbol for hertz?

speed

rate at which a wave travels

v

what’s the symbol for speed?

sir isaac newton

who created the particle theory of light?

particle theory of light

idea that light can be pictured as streams of tiny particles emitted by light sources

christiaan huygens

created the wave theory of light

james clerk maxwell

created the electromagnetic wave

wave theory of light

theory stating that light consists of a series of waves rather than individual particles

electromagnetic wave

wave consisting of an electric field and a magnetic field vibrating at right angles to each other

3.00 × 10^8 m/s

what’s the measure of the speed of light?

never

fill in the blank

the measured speed of light in a vacuum ________ varies

c

what’s the symbol for the speed of light?

electromagnetic spectrum

arrangement of all forms of electromagnetic radiation in order of frequency and wavelength

wave-particle duality

nature of light as exhibiting properties of both waves and particles

• max planck

• albert einstein

created wave-particle duality

quantum theory of light

theory stating that light consists of electromagnetic waves traveling as tiny bundles or “packets” of energy called photons

photons

tiny bundles or “packets” of energy that light consists of

light

electromagnetic waves traveling as photons

whole

fill in the blank

light must consist of ________ numbers of photons

h

what’s the symbol of planck’s constant?

6.626 × 10^-34 j x s

what is planck’s constant equal to?

monochromatic

light of a single frequency