Ch.7 - Quantum MechanicsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Both energy & matter have different properties, including the way they travel and interact with their surroundings. 

Refraction vs. Diffraction

Concept #1: Understanding Refraction

In refraction, a particle changes direction as it moves from one medium to another. Energy (light) and matter refract differently. 

Concept #2: Understanding Diffraction

In diffraction, a particle bends around an object it encounters. Energy (light) and matter will experience this phenomenon differently. 

Constructive Interference & Destructive Interference

Concept #3: Understanding the difference between Constructive and Destructive Interference

In constructive interference, waves that are in phase will combine together and increase the amplitude. In destructive interference, waves are out of phase and cancel one another out. 

Additional Problems
Determine whether an interference pattern is observed on the other side of the slits in each of the following experiments.An electron beam is aimed at two closely spaced slits. The beam produces only one electron per minute.
Determine whether an interference pattern is observed on the other side of the slits in each of the following experiments.An electron beam is aimed at two closely spaced slits. A light beam is placed at each slit to determine when an electron goes through the slit.
Determine whether an interference pattern is observed on the other side of the slits in each of the following experiments.A high-intensity light beam is aimed at two closely spaced slits.
Determine whether an interference pattern is observed on the other side of the slits in each of the following experiments.A gun is fired at a solid wall containing two closely spaced slits. (Will the bullets that pass through the slits form an interference pattern on the other side of the solid wall?)
Explain the wave behavior known as interference.
Explain the difference between constructive and destructive interference.
Explain the wave behavior known as diffraction. Draw the diffraction pattern that occurs when light travels through two slits comparable in size and separation to the lights wavelength.
Explain electron diffraction.
How does electron diffraction demonstrate the complementarity of the wave nature and particle nature of the electron?
Describe the interference pattern that results from the diffraction of electrons passing through two closely spaced slits.
What happens to the interference pattern that results from the diffraction of electrons passing through two closely spaced slits if the rate of electrons going through the slits is decreased to one electron per hour?
What happens to the pattern if we try to determine which slit the electron goes through by using a laser placed directly behind the slits?
Under which conditions is constructive interference observed at a point on the target screen in a two slit experiment with waves? a. When waves from each slit arrive in-phase.b. When waves from each slit arrive 90° out of phase.c. When waves from each slit do not arrive at the point.d. When waves from each slit arrive at different times.e. Constructive interference is never observed.
Which of the following is true about matter and energy?A. Matter and energy can not be interchangedB. Matter and energy can be interchanged, but not destroyedC. Matter and energy can be interchanged, and destroyedD. Matter and energy can be created
Which statement related to particle and wave properties of matter is correct?a. Particles exhibit diffraction while waves do not.b. A wave travels straight through a slit.c. Interference patterns are observed when a wave passes through a barrier with two slits.d. Particles interfere constructively and destructively whereas waves do not.
When a wave encounters an obstacle or a slit that is comparable in size to its wavelength, it bends around it. This characteristic is called ________.A. Destructive interferenceB. DiffractionC. Photoelectric effectD. Uncertainty principleE. Amplitude
Refractometry is based on the difference in the speed of light through a substance (v) and through a vacuum (c). In the procedure, light of known wavelength passes through a fixed thickness of the substance at a known temperature. The index of refraction equals c/v. Using yellow light (λ = 589 nm) at 20 °C, for example, the index of refraction of water is 1.33 and that of diamond is 2.42. Calculate the speed of light in water.
Refractometry is based on the difference in the speed of light through a substance (v) and through a vacuum (c). In the procedure, light of known wavelength passes through a fixed thickness of the substance at a known temperature. The index of refraction equals c/v. Using yellow light (λ = 589 nm) at 20 °C, for example, the index of refraction of water is 1.33 and that of diamond is 2.42. Calculate the speed of light in diamond.
Neutron diffraction is used in determining the structures of molecules. Calculate the de Broglie wavelength of a neutron moving at 1.00% of the speed of light.