The uncertainty principle states that a particle cannot be precisely localized.
a. True
b. False
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[Ques. 2] In the Bohr model of the hydrogen atom both the energy and orbital angular momentum of the electron are quantized.
a. True
b. False
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[Ques. 3] In an energy level transition from the n = 2 state to the n =1 state for a hydrogen atom a photon will be emitted.
a. True
b. False
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[Ques. 4] An atom can be excited into a higher energy state by absorbing a photon.
a. True
b. False
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[Ques. 5] An excited atom can lose energy by emitting an electron.
a. True
b. False
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[Ques. 6] A photon is quantum of electromagnetic radiation.
a. True
b. False
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[Ques. 7] The photoelectric effect occurs when electrons are emitted when light strikes the surface of a metal.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 8] When an object is viewed through a magnifying glass, an object 20 cm high appears as an upright image 100 cm high. What is the magnification?
[Ques. 9] A magnifying glass with focal length 15 centimeters is placed 12 centimeters above a stamp. (a) Where is the image? (b) What is the magnification? (c) Is the image produced a real or a virtual image?
[Ques. 10] A movie projector is equipped with a 0.5-meter focal length lens that is positioned 0.506 meters from the film. (a) How far from the lens must the screen be if the image on it is to be in focus? (b) How many times larger is the image than the object? (c) Is the image produced a real or a virtual image?
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