woodchurch science

we’ve been talking about luminous and non-luminous objects and james from 7x asked how night vision goggles work. they function in 2 ways: (a) image enhancement - this works by collecting the tiny amounts of light, including the lower portion of the infrared light spectrum, that are present but may be imperceptible to our eyes, and amplifying it to the point that we can easily observe the image and (b) thermal imaging - this technology operates by capturing the upper portion of the infrared light spectrum, which is emitted as heat by objects instead of simply reflected as light. hotter objects, such as warm bodies, emit more of this light than cooler objects like trees or buildings.

thanks for the question james, hope this answers it.

This entry was posted on Monday, September 10th, 2007 at 6:34 pm and is filed under ks3, physics, questions, warren, y7. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.