Photon Energy and Planck Constant Quiz

What is the speed of light in meters per second?

• 3 x 10^6

• 3 x 10^8

• 3 x 10^12

• 3 x 10^10

Which of the following statements is true about photons?

• Photons are only particles.

• Photons are only waves.

• Photons exhibit both wave and particle properties.

• Photons are neither waves nor particles.

What happens to the energy of a photon as its wavelength decreases?

• Energy increases

• Energy becomes zero

• Energy remains constant

• Energy decreases

What is the value of the Planck constant?

• 6.63 x 10^-34 Joule-seconds

• 6.63 x 10^-32 Joule-seconds

• 6.63 x 10^-36 Joule-seconds

• 6.63 x 10^-38 Joule-seconds

What is the unit of the Planck constant?

• Hertz

• Joules

• Seconds

• Joule-seconds

How is the frequency of a photon related to its wavelength?

• Frequency is directly proportional to wavelength

• Frequency is inversely proportional to wavelength

• Frequency is equal to wavelength

• Frequency is unrelated to wavelength

Which constant is used to calculate the energy of a photon from its frequency?

• Speed of light

• Planck constant

• Gravitational constant

• Boltzmann constant

What is the energy in Joules of a photon with a frequency of 2x10^6 Hz?

• 1.33x10^-29 Joules

• 1.33x10^-25 Joules

• 1.33x10^-27 Joules

• 1.33x10^-31 Joules

How many Joules are equivalent to 1 electron-volt?

• 1.60 x 10^-19 Joules

• 1.60 x 10^-21 Joules

• 1.60 x 10^-17 Joules

• 1.60 x 10^-23 Joules

What is the wavelength of a photon with an energy of 38 electron-volts?

• 3.27x10^-12 meters

• 3.27x10^-8 meters

• 3.27x10^-10 meters

• 3.27x10^-6 meters