Understanding Electromagnetic Waves

What is the speed of light in meters per second?

• 3 x 10^6 m/s

• 3 x 10^8 m/s

• 3 x 10^10 m/s

• 3 x 10^12 m/s

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What is the relationship between the wavelength and frequency of an electromagnetic wave?

• Inversely proportional

• Directly proportional

• Not related

• Equal to each other

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What unit is used to measure the frequency of a wave?

• Hertz

• Seconds

• Joules

• Meters

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What constant is used to calculate the energy of an electromagnetic wave?

• Newton's constant

• Avogadro's number

• Planck's constant

• Boltzmann's constant

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What is Planck's constant?

• 9.81 m/s^2

• 6.626 x 10^-34 J.s

• 8.314 J/(mol.K)

• 1.602 x 10^-19 C

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How are electromagnetic waves different from waves on a string?

• They are not affected by gravity

• They do not have amplitude

• They consist of electric and magnetic fields

• They can only travel through a vacuum

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What does the electric field component of an electromagnetic wave do?

• Vibrates side to side

• Moves in a straight line

• Remains constant

• Oscillates up and down

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What happens when an electron drops from a higher energy level to a lower one?

• It becomes a proton

• It emits an electromagnetic wave

• It remains stationary

• It absorbs a photon

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What is the effect of heating a metal to a very high temperature?

• It becomes superconductive

• It emits sound waves

• It emits electromagnetic waves

• It becomes invisible

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What causes the emission of electromagnetic waves from heated metals?

• Decomposition

• Nuclear fusion

• Chemical reactions

• Oscillation of electrons

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