What Makes Infrared Photography Different from Visible Light Photography?

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Infrared photography differs from visible light photography primarily due to the distinct wavelengths involved, with infrared capturing heat signatures rather than colors. While visible light reveals the colors of objects, infrared images display variations based on temperature, resulting in a unique appearance. Infrared cameras can penetrate opaque materials, making them useful for detecting individuals or objects obscured from view. This capability highlights the practical applications of infrared technology beyond artistic photography. Understanding these differences is essential for utilizing both techniques effectively.
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Hi .. May i ask why does a infrared photograph of a person look different from a photograph taken from visible light ?


Relevant Equations :

V = ƒ x lambda



I believe it has got to do with the wavelength or frequency. However, i can't explain it ..
 
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in visible light photograph you can see the colours but infrared works on heat signatures.

It shows different colors on the amount heat of the object its capturing

therefore infrared cameras are also used to search people covered by something. visible light cannot penetrate any opaque thing but infrared due to large wavelength penetrates it and can be see through cameras.
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
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