Light

Wavelength

The distance from one peak to the next

Frequency

The number of peaks passing by any point of each second

Speed formula

Wavelength x Frequency

Correlation of wavelength and frequency

Longer the length lower the frequency

Shorter the length lower the frequency

Photons

An individual particle of light, characterized by a wavelength and a frequency

Electromagnetic radiation (light)

The complete spectrum of light, including radio waves, infrared light, visible light, ultraviolet light, x rays, and gamma rays

Visible ligh

The light our eyes can see

Atomic number

Number of protons

Atomic mass number

Number of protons + neutrons

Isotopes

Forms of an element that have the same number of protons but different number of neutrons

Molecules

The smallest unit of a chemical element or compound

Compound

Molecules with two or more types of atom

Doppler effect

The effect that shifts the wavelengths of spectral features in objects that are moving toward or away from the observer

Doppler effect in more detail

As something moves farther away from the sound the sound waves stretch to longer wavelengths leading to a lower frequency and a lower sound. As something is moving towards the sound waves bunch up to shorter wavelengths leading to a higher frequency and more sound.

Blueshift

Usually for the left and is for things coming towards us

Redshift

Longer wavelengths of visible light are redder

For objects moving away from us