Term
| In the quantum world uncertainties exist in our knowledge of |
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Definition
| the difference between an object's postion and velocity |
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Term
| Which of the following describes experiments scientists have used to determine whether quantum objects are waves or particles? |
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Definition
experiments testing particle properties
experiments testing wave properties
double-slit test
tests designed to "trick" the particles into revealing their identity
all of the above |
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Term
| How do descriptions of the state of quantum objects differ from descriptions of items we see every day? Descriptions of quantum objects _________ |
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Definition
| are given in terms of probabilities. |
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Term
| At a quantum-scale, events are described in __________ |
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Definition
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Term
| One of the major differences between a standard x-ray and a cat scan is that _______ |
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Definition
| only a cat scan can produce a three dimensional images of the interior of the body. |
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Term
| The double-slit apparatus was used in a famous experiment to __________ |
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Definition
| distinguish waves from particles. |
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Term
| When you use a self-focusing digital camera, the photoelectric effect occurs when |
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Definition
| light energy is converted into electrical current that determines the opening in the lens. |
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Term
| The principles of quantum mechanics state that ___________ |
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Definition
| in the quantum world, prediction of the future is probability. |
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Term
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Definition
| semiconductors that trap electrons within an electric field |
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Term
| A quantum leap occurs when |
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Definition
| whenever an electron moves between energy levels |
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Term
| Albert Einstein's Nobel prize in 1921 was based upon work |
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Definition
| which led to modern concept of the photon. |
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Term
| The Newtonian view of the universe would be associated with which phrase? |
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Definition
predicting future states
the Divine Calculator
clockwork precision
macroscopic
(all of the above) |
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Term
| Something is quantized when it |
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Definition
| has attributes of a bundle. |
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Term
| Measurements can be made on a macroscopic object without altering the object because __________. |
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Definition
| the energy of the object is much greater than the energy of the probe. |
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Term
| In quantum mechanics, the product of the uncertainty in position times the uncertainty in velocity must be _________. |
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Definition
| larger than Planck's constant divided by mass. |
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Term
| A train with a mass of 100,000 kg is crossing a bridge that is 10 m long. What is the uncertainty in the velocity? |
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Definition
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Term
| What are some practical applications of the photoelectric effect? |
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Definition
-camera light meters
-fiber optics in some telephone audio systems
-computerized axial tomography
(all of the above) |
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Term
| If electrons are like particles, then ________. |
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Definition
| they must have a precise velocity to stay in a stable orbit. |
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Term
| Only certain electron orbits are possible in the atom because ___________. |
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Definition
| the electron's distance from the nucleus has to satisfy a wave and particle duality. |
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Term
| A scientist who orders a double-slit apparatus for his lab might be planning to _____________. |
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Definition
| try to determine whether an object is a particle or a wave. |
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Term
| If pizza were a quantized object, that would mean it ________. |
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Definition
| would be sliced without leftovers. |
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Term
| Why do we not have to worry about the uncertainty principle in our everyday life? |
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Definition
| Objects we normally encounter have mass in amounts that make the effects of the uncertainty principle practically non-existent. |
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Term
| When measuring a car's speed and distance during a road trip, the amount of uncertainty can, in principle, be made ____________. |
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Definition
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