# Test: Question Preview (ID: 25536)

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Which of the following behaviors of light provides evidence for its wave nature? |
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a) Light will travel indefinitely in a straight line until it strikes an object. | b) Light striking a flat surface at an angle is reflected at the same angle. | c) Two beams of light that meet can create interference with each other. | d) The amount of energy in a beam of light can be measured and calculated. | |

A ___________________________ is a discrete unit (quantum) of light energy. |
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a) work | b) photon | c) Planck | d) wavelength | |

If radiation has a frequency of 3.0 X 10^15 Hz and it strikes a material, what is the energy of each incident photon (Planck’s constant is 6.6 X 10^-34)? |
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a) 1.98 x 10-18 | b) 1.23 x 10^23 | c) 5.6 x 10^6 | d) 7.3 x 10^-7 | |

If the frequency of light is 5.34 X 10^14 Hz, calculate the energy of the photon (Planck’s constant is 6.6 X 10^-34). |
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a) 3.56 x 10^-7 | b) 1.23 x 10^23 | c) 1.98 x 10^-18 | d) 3.5244 x 10^-19 | |

What is the Value of Planck's constant? |
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a) 6.67 x 10^-11 Js | b) 6.67 x 10^-19 Js | c) 1.6 x 10^-19 Js | d) 6.63 x 10^-34 Js | |

What is E = hf ? |
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a) Formula for frequency and the speed of light | b) Wavelength and frequency | c) Einsteins formula for the energy of a photon | d) De Broglie wavelength formula | |

Charge of an UP quark? |
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a) 1/3 | b) -1/3 | c) 2/3 | d) -2/3 | |

What distance is an angstrom? |
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a) 10^-5 m | b) 10^-10 m | c) 10^-15m | d) 10^-20 m | |

What distance is a femtometre? |
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a) 10^-5 m | b) 10^-10 m | c) 10^-15 m | d) 10^-20 m | |

What is the speed of light? |
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a) c = 3.00 x 10^18 m/s | b) c = 3.00 x 10^9 nm/s | c) c = 3.00 x 10^8 nm/s | d) c = 3.00 x 10^8 m/s | |

Whats the charge of a down Quark? |
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a) 1/3 | b) 2/3 | c) -1/3 | d) -2/3 | |

E = |
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a) hc | b) mp | c) fλ | d) hf | |

Physicist Thomas Young created the __________ to demonstrate the wave like properties of light. |
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a) Shadow Box Experiment | b) Cat in the Box Experiment | c) Double-Slit Experiment | d) Wave-Pool Experiment | |

What is the unit of measurement for Planck's constant |
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a) Joules | b) Joules per second | c) Joule seconds | d) Coulombs | |

What is the unit of measurement for Electromagnetic Charge? |
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a) Joules | b) Coulombs | c) Joule Seconds | d) Hz | |

What is an electron orbital? |
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a) The work function of a quark | b) The shape in which an electron perfectly orbits a nucleus | c) 3-D shapes defining 90% probability region where electrons may be at any given energy state | d) There's no such thing | |

In some situations, when a beam of light is directed at a metal surface, an electron is emitted. This happens because the photons in the light - |
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a) combine with metal atoms to create electrons, which escape | b) are transformed into electrons with enough energy to escape. | c) transfer their energy to an electron, helping the electron escape. | d) are destroyed on impact, generating electrons which escape. | |

The deBroglie wavelength theory equation.... |
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a) Not even real | b) is used to calculate the energy of a Photon E = hf | c) E=mc^2 | d) is used to calculate wavelength of matter, λ = h/p or λ = h/mv | |

As a photon strikes a piece of metal, the kinetic energy of an ejected electron is determined by - |
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a) the frequency of the absorbed photon. | b) the number of absorbed photons. | c) the path taken by the escaped electron. | d) the mass of the escaped electron. | |

A beam of light is directed onto a sheet of metal, but electrons are not ejected from the metal. Increasing which of the following could possibly cause the metal to begin to eject electrons? |
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a) Frequency | b) Wavelength | c) Intensity | d) Speed | |

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