Atoms, Isotopes and Lights Waves Fall 2021

Which of these provides a list of visible light colors in correct order starting from the highest energy and ending with the lowest energy?

• Violet, Indigo, Blue, Green, Yellow, Orange, Red

• Red, Yellow, Green, Orange, Violet, Blue, Indigo

• Red, Orange, Yellow, Green, Blue, Indigo, Violet

• Violet, Yellow, Orange, Blue, Green, Indigo, Red

Which of these types of Electromagnetic Light waves has the lowest energy?

• gamma ray

• ultraviolet

• visible light

• microwave

Which of these colors of visible light listed below has the highest wave frequency and therefore most energy?

• red

• orange

• green

• blue

• yellow

What units was the Wavelength of light measured in during our spectroscopy lab?

• nanometers (nm)

• hertz (Hz)

• calories (cal)

• Joules (J)

Which units is the frequency of light waves measured in?

• meters

• joules

• hertz (Hz) or waves per second

• calories

Which image or diagram shows what happens to an electron just before a photon of light is emitted from an atom?

• A

• B

• C

• D

Astronomers gathered an emission spectrum from a Nebula cluster of stars in our universe labelled here as unknown mixture.

According to the emission spectrum data given which gases are combined together in unknown mixture of gases from the Nebula?

• Gas B & Gas D

• Gas C & Gas B

• Gas A & Gas D

• Gas D & Gas C

According to this image, photons of light are emitted from an atom only right after an electron________________.

• drops from a higher to a lower energy level.

• jumps from a lower to a higher energy level.

• moves within its atomic orbital.

• falls inside the nucleus.

Why are emission spectra of elements also referred to as "atomic fingerprints"?

• They are all the same for all elements on the periodic table

• They are all unique to a specific element

• They are detected only when touch with our fingers

• They all contain every single color of visible light

Only a star's _______________ can give the necessary information about the composition (what is made of) of a star.

• luminosity of protons

• emission spectra

• temperature

• location within the universe