Unit 2 Part 2 Notes 3: Quantum Mechanics

Photoelectric effect provides the evidence for the ______ nature of radiation.

• dual

• wave

• particle

• electromagnetic

A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

The photoelectric effect only occurs if the light shining on the metal is:

• coherent.

• above a minimum intensity.

• above a minimum frequency.

• above a minimum color.

Light acts like

• a wave.

• a particle.

• Both a wave and a particle

• neither a wave nor a particle.

Which of the following would give a continuous spectrum? (check all that apply)

• hydrogen lamp

• the sun

• neon lights

• incandescent light

If an electron moves from n=4 to n=2 it ____

• absorbs energy

• releases energy

The _____ determines the color of visible light.

• wavelength

• speed

• amplitude

• light

A wave with a long wavelength will have a ______ frequency and _____ energy

• high, low
• high, high
• low, high
• low, low

Which electron transition is associated with a higher energy wave?

• n = 4 to n = 3

• n = 4 to n = 2

• n = 4 to n = 1

Bohr's idea about the atom is pretty good, however it has limitation. What is this limitation?

• It lacks substantial evidence explaining the spectral lines of the Hydrogen atom.

• His model is too simple.

• His model can no longer explain the behavior of electron based on its spectral lines of atoms with more than one electron.

• None of the above