what would be a good science fair topic for a diy projector.
I picked this for a science fair topic because it is fun and moderatly easy.
I picked this for a science fair topic because it is fun and moderatly easy.
Science Fair
Say what grade level and you might get some more responses.
One idea: Control of unwanted UV and IR light is important in a DIY projector. A project could investigate the UV and IR transmission, reflection, and absorbtion of various substances that transmit visible light.
Resources:
window glass, Lexan XL, Plexiglass, black-light bulb, heat lamp bulb from Home Depot
cold mirror & hot mirror from surplusshed.com
small aquarium or Pyrex baking dish filled with 1 centimeter of water as an IR-absorbing filter (always use metric measures in Science Fair projects: Science teacher judges love that! 😀 ) Measure IR blocking with glass-only, then with glass+water, then with more water in the light path? Measure transmitted IR and change in water temperature.
paper cup with a lid, painted flat black with a thermometer inside, as an IR measuring device
IR LED from Radio Shack (They also sell IR phototransistor so you can build a higher-tech IR measuing device.)
Video camera as an IR detector (good for demo)
fluorescent paint as a UV detector
Good camera shops sell Kodak Wratten filters: Some IR, but a red + a blue will block most visible light and let IR pass.
Say what grade level and you might get some more responses.
One idea: Control of unwanted UV and IR light is important in a DIY projector. A project could investigate the UV and IR transmission, reflection, and absorbtion of various substances that transmit visible light.
Resources:
window glass, Lexan XL, Plexiglass, black-light bulb, heat lamp bulb from Home Depot
cold mirror & hot mirror from surplusshed.com
small aquarium or Pyrex baking dish filled with 1 centimeter of water as an IR-absorbing filter (always use metric measures in Science Fair projects: Science teacher judges love that! 😀 ) Measure IR blocking with glass-only, then with glass+water, then with more water in the light path? Measure transmitted IR and change in water temperature.
paper cup with a lid, painted flat black with a thermometer inside, as an IR measuring device
IR LED from Radio Shack (They also sell IR phototransistor so you can build a higher-tech IR measuing device.)
Video camera as an IR detector (good for demo)
fluorescent paint as a UV detector
Good camera shops sell Kodak Wratten filters: Some IR, but a red + a blue will block most visible light and let IR pass.
alright i have narrowed it down to 2 choices
1. Why do rear projectors have a glare and seem different at different angles.
2. rear projector vs. front projector
1. Why do rear projectors have a glare and seem different at different angles.
2. rear projector vs. front projector
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