Unit 2 - VI. Wavelength, frequency, energy, & electron math

Electromagnetic radiation

energy that has wave-like behavior, contained within a photon

Photon

• basic particle of light

• EM particle w/ quantized energy

EM radiation has what associated w/ it?

• a wavelength

• frequency

• energy

Equation for speed of light C (m/s)

• wavelength (m) x frequency (hertz)

When wavelength increases,

frequency decreases (& vice versa)

Energy of photon is relative to

frequency of photon

Equation for energy (J)

• Planck’s constant h x frequency (hertz)

Since frequency is used in both equations, what can be applied?

substitution

Wavelength is often given in which unit of measurement?

nanometers

• 1 nanometer = 1 × 10^-9 meters

Electromagnetic spectrum

a collective of all known photon wavelengths/frequencies

The electromagnetic spectrum ranges from lowest ____ to highest ____.

frequency

Order on the electromagnetic spectrum (from lowest to highest frequency)

• radio waves

• microwaves

• infrared waves

• ROYGBIV

• ultraviolet waves

• x-rays

• gamma

In visible light, highest energy is ____, and lowest energy is ____.

purple, red