How big should a lens be to focus enough light to reach 1000 Celcius?

In summary, the conversation revolves around determining the size of a glass lens needed to focus enough light to reach a temperature of 1000 Celcius at its foci. The idea of using a material with a higher refractive index to reduce the lens size is also discussed, but it is mentioned that energy does not directly translate to temperature. Resources for further reading on the topic are provided.
  • #1
Panthera Leo
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How big should a lens be to focus enough light to reach 1000 Celcius?

I was wondering how big should a glass lens be to focus enough light to produce a temperature of about 1000 celcius at its foci?

What if the lens was made up of sth with higher refractive index, doesn't this reduce the size of lens?

A rough guess will do... I am just curious

Thanks in advance :)
 
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  • #3


So we have yet another post (three or four of then today) that seems to assume that a specific amount of energy translates to a specific temperature. That is NOT true.
 

1. What is the relationship between lens size and light intensity?

The size of a lens directly affects the amount of light that can be focused through it. Larger lenses have a greater surface area to collect light, resulting in a higher intensity of light being focused.

2. How does the focal length of a lens impact the light intensity at a given temperature?

The focal length of a lens, which is the distance from the lens to the point where light converges, also plays a role in light intensity. A longer focal length allows for a larger area of light to be focused, resulting in a higher intensity at a given temperature.

3. Is there a specific lens size that is ideal for reaching 1000 degrees Celcius?

The ideal lens size for reaching 1000 degrees Celcius will depend on a variety of factors, such as the type of light source being used, the distance between the lens and the light source, and the material properties of the lens. It is best to consult with a scientist or engineer to determine the most suitable lens size for a specific application.

4. Can a smaller lens be used to reach 1000 degrees Celcius by increasing the light intensity?

In theory, a smaller lens could be used to reach 1000 degrees Celcius by increasing the light intensity. However, this would require a very powerful light source and may not be practical or safe. Additionally, using a smaller lens may result in a smaller area of light being focused, which could affect the overall temperature distribution and accuracy of the measurement.

5. Are there any other factors besides lens size that can affect the light intensity at 1000 degrees Celcius?

Yes, there are several other factors that can affect the light intensity at 1000 degrees Celcius, such as the type of material being heated, the distance between the lens and the material, and the presence of any obstructions or reflections that could alter the light path. These factors should be taken into consideration when determining the appropriate lens size for a specific application.

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