The minimum number of photons per second?

In summary, the minimum number of photons per second, also known as photon flux, is the minimum number of photons required for a visible light signal. It is calculated by dividing the energy of a visible light signal by the energy of a single photon and is affected by the sensitivity of the human eye and efficiency of the light source. It can vary for different light sources and is significant in fields such as optics, astronomy, and photonics. It relates to the concept of quantum mechanics and helps understand the behavior of light in various physical systems.
  • #1
girlygirl55
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Homework Statement



An owl has good night vision because its eyes can detect a light intensity as small as 4.5 10-13 W/m2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 7.5 mm and the light has a wavelength of 503 nm?



Homework Equations



I'm not really sure how to begin. Can you help me solve this step by step?

Photons per sec= Energy per sec/Energy per photon ??


The Attempt at a Solution

 
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  • #2
girlygirl55 said:
Photons per sec= Energy per sec/Energy per photon
Sure, that'd be a good start.
 

What is the minimum number of photons per second?

The minimum number of photons per second, also known as the photon flux, is the minimum number of photons that need to be emitted from a light source in order to produce a visible light signal.

How is the minimum number of photons per second calculated?

The minimum number of photons per second is calculated by dividing the energy of a visible light signal by the energy of a single photon. It is also affected by the sensitivity of the human eye and the efficiency of the light source.

Can the minimum number of photons per second vary for different light sources?

Yes, the minimum number of photons per second can vary for different light sources. It is dependent on the energy of the light source and its efficiency in emitting photons.

What is the significance of the minimum number of photons per second?

The minimum number of photons per second is important in various fields such as optics, astronomy, and photonics. It helps determine the sensitivity and detection capabilities of instruments, as well as the minimum exposure time needed for accurate measurements.

How does the minimum number of photons per second relate to the concept of quantum mechanics?

The minimum number of photons per second is a fundamental concept in quantum mechanics, as it relates to the discrete nature of light and its energy. It also plays a role in understanding the behavior of light in various physical systems.

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