A beam of orange light and a beam of green light have same energies. Which of these light beams contains greater number of photons?
Question
A beam of orange light and a beam of green light have same energies. Which of these light beams contains greater number of photons?
Solution
The number of photons in a light beam is determined by the energy of the light beam divided by the energy of each individual photon. The energy of a photon is given by the equation E=hf, where E is the energy, h is Planck's constant, and f is the frequency of the light.
Given that the energy of the orange and green light beams are the same, the beam with the greater number of photons will be the one with the lower frequency, because lower frequency means lower energy per photon, which means more photons for the same total energy.
The frequency of light is inversely proportional to its wavelength. Orange light has a longer wavelength (and therefore lower frequency) than green light. Therefore, a beam of orange light of the same energy as a beam of green light will contain more photons.
Similar Questions
Which of the following has the greatest energy per photon?Group of answer choicesRed LightUltraviolet raysGreen LightBlue Light
The energy of a photon is greatest for 1 pointvisible lightultraviolet lightinfrared lightX-ray radiation
X-rays...Group of answer choicesmove slower than gamma raysmove faster than red lighthave a higher energy than gamma rayshave a higher energy than green light
A lower energy photon will also have... Group of answer choicesno wave-like propertiesa longer wavelengtha higher frequencya slower velocity
Determine which of the following statements about the wavelength of light are true.Shorter wavelength light waves are brighterViolet light has a shorter wavelength than red lightWhite light has one specific wavelengthThe separated colours will always be found in the same orderI'm not sure
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.