The Nature of Light

Which of the following describes the role of electrons?

• They participate in chemical reactions

• They add mass to the atom

• They add stability to the atom

• They define the element

Which of the following is not part of the electromagnetic spectrum?

• visible light

• gamma rays

• electric current

• radio waves

The true nature of light is that light is...

• a wave (energy)

• a particle

• both a wave (energy) and a particle

• a plasma

Which of the following describes the photoelectric effect?

• A salt is placed in a flame and the flame turns a specific color

• Light of a specific color causes electrons to be knocked off of a piece of metal

• Two small atoms merge into one atom, causing a small amount of mass to be converted into a large amount of energy

• A rock containing a radioactive element leaves marks on film

Which of the following is the term that describes the distance between one crest and the next crest of a wave?

• Frequency

• Wavelength

• Energy

• Speed of light

Which of the following is the term that describes the number of crests that pass a given point each second?

• Frequency

• Wavelength

• Energy

• Speed of light

ν is the symbol for which of the following?

• Frequency

• Wavelength

• Energy

• Speed of light

λ is the symbol for which of the following?

• Frequency

• Wavelength

• Energy

• Speed of light

A light wave that has a high frequency will also have a large ___________.

• Frequency

• Wavelength

• Energy

• Speed of light

A light wave that has a high frequency will also have a small ___________.

• Frequency

• Wavelength

• Energy

• Speed of light