Understanding Photon Energy

What is the formula for calculating photon energy?

• E = pλ

• E = 1/2 mv^2

• E = mc^2

• E = hf

How does the energy of a photon relate to its frequency?

• The energy of a photon increases with its frequency.

• The energy of a photon decreases with its frequency.

• The energy of a photon is inversely proportional to its frequency.

• The energy of a photon is independent of its frequency.

What is the energy of a photon with a wavelength of 500 nm?

• 1.200 x 10^-18 J

• 5.000 x 10^-19 J

• 2.482 x 10^-19 J

• 3.976 x 10^-19 J

Explain the relationship between photon energy and the electromagnetic spectrum.

• Photon energy is unrelated to frequency or wavelength.

• Wavelength increases with frequency in the electromagnetic spectrum.

• Photon energy is constant across the electromagnetic spectrum.

• Photon energy increases with frequency and decreases with wavelength across the electromagnetic spectrum.

What unit is commonly used to express photon energy?

• electronvolts (eV)

• watts (W)

• joules (J)

• calories (cal)

How does temperature affect the energy of photons emitted by a black body?

• Higher temperature results in higher energy photons emitted by a black body.

• Lower temperature results in higher energy photons.

• Temperature has no effect on photon energy.

• Higher temperature decreases photon energy.

What is the significance of Planck's constant in photon energy calculations?

• Planck's constant is crucial for calculating photon energy, as it relates energy to frequency.

• Planck's constant determines the color of light.

• Planck's constant is used to calculate mass.

• Planck's constant measures the speed of light.

How do photons behave differently in a vacuum compared to a medium?

• Photons travel at the speed of light in a vacuum, but their speed is reduced in a medium due to interactions with matter.

• Photons travel faster in a medium than in a vacuum.

• Photons can only exist in a medium and not in a vacuum.

• Photons do not interact with matter in a medium.

What is the energy of a photon in the ultraviolet range compared to the infrared range?

• The energy of a photon in the ultraviolet range is equal to that in the infrared range.

• The energy of a photon in the ultraviolet range is higher than that in the infrared range.

• The energy of a photon in the ultraviolet range is negligible compared to that in the infrared range.

• The energy of a photon in the ultraviolet range is lower than that in the infrared range.

Describe an application of photon energy in modern technology.

• Photon energy is used in traditional light bulbs to produce heat.

• Photovoltaic cells in solar panels convert sunlight into electricity.

• Photon energy is harnessed in wind turbines to generate power.

• Photon energy is utilized in chemical reactions for fuel production.