Modern Physics Review Game

The speed of the electrons ejected from a metal surface can be increased by

• using light of higher frequency.

• using light of longer wavelength.

• using light of higher intensity.

• using monochromatic, polarized light.

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The energy of a photon is directly proportional to its _____ and inversely proportional to its ______.

• intensity - speed

• wavelength - frequency

• frequency - wavelength

• intensity - wavelength

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Light of a single wavelength is incident on a metal. Electrons are released. The intensity of the light is then increased while keeping frequency constant.

Which of the following changes occur?

• Rate of electron emission: increase.

  Energy of electrons: increase.

• Rate of electron emission: decrease.

  Energy of electrons: no change.

• Rate of electron emission: decrease.

  Energy of electrons: increase.

• Rate of electron emission: increase.

  Energy of electrons: no change.

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Mass and energy are interrelated and this is shown with Einstein's equation, E=mc². 

• True
• False

This image is an illustration of

• photoelectric effect
• Dalton's atomic theory
• Bohr model
• Quantum mechanical model

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When two small nuclei combine into a larger nucleus.

• fission

• fusion

• alpha decay

• beta decay

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What color of light has the greatest energy per photon?

• Red

• Green

• Blue

• Violet

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Which of these processes describes a nuclear fusion reaction?

• A nucleus absorbs energy to produce lighter nuclei.

• A nucleus splits to produce energy and lighter nuclei

• Two nuclei bind together to produce energy and heavier nuclei.

• Two nuclei bind together to produce energy and a lighter nuclei.

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Isotopes of the same element have different ____________. 

•  numbers of protons  
• numbers of electrons
•  symbols 
• numbers of neutrons

What kind of force holds the nucleus together?

• Strong Nuclear Force

• Weak Nuclear Force

• Gravitational Force

• Electromagnetic Force