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Newport 20D20AL.2 Broadband Metallic Mirror Pyrex 50.8 mm Diameter λ/10 250-600 |  |
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US $107.99 | 28d 22h 1m |
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Newport 10D20ER.2 Metallic FLAT MIRROR PYREX Optics Optical Laser 25.4mm round | |
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US $64.98 | 27d 23h 38m |
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Newport Pyrex ValuMax Mirror 250-600nm 10D520AL.2 | |
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US $25.00 | 23d 20h 37m |
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Newport Pyrex Laser Optic Mirror 2.5" in Diameter / f=127mm Large Optic Mirror | |
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US $49.00 | 20d 19h 36m |
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Newport 10D20ER Broadband Mettalic Mirror Pyrex 25.4 mm 1/10 wave Thorlabs | |
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US $20.00 | 13d 16h 43m |
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Newport 10D20ER Broadband Mettalic Mirror Pyrex 25.4 mm 1/10 wave Thorlabs NIB | |
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US $40.00 | 13d 16h 41m |
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Newport Qty. 2 Round Pyrex Mirror 05D20AL.2 UV AL COAT 250-600nm NEW | |
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US $70.00 | 12d 18h 16m |
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NEW!! Newport Round Pyrex Mirror 2.0in.! | |
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US $40.95 | 11d 20h 49m |
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Newport 10D520AL.2 Valumax Pyrex Mirror 25.4mm Diameter 1/10 Wave 250-600nm | |
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US $29.99 | 10d 18h 46m |
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Newport Flat Mirror Laser Optic Photonics Pyrex Diameter 1/10 Wave 450-700nm NEW | |
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US $149.99 | 10d 8h 13m |
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Pyrex Mirror
Resolving an elephant at 5 light years?
I decided for chuckles to calculate the telescope aperture required to resolve an elephant at a distance of 5 light years and came up with a 9 million km mirror. I may have slipped up. Let resolution be defined as Dawes' at .116/m of aperture, and y'all can handle the trig and the size of the elephant any way you want within reason.
This is a tricky calculation with lots of zeroes so I thought I would throw it out for someone to double check.
I'll be there's more than one person out there who can crunch this so "best answer" may be reserved for the answer that includes a reasonable calculation of the thickness and cooling time of the pyrex. You can choose another substrate if you like. Don't forget to show your work! (within reason)
thanks.
I thought I'd add that, to get this resolution, you do not literally need a 6 million km diameter telescope mirror. It can be done with a phased locked array of just a few telescopes spread out in space over 9 million km. It's easier to do such a thing with radio waves (google "very large array") because the dimensional tolerances are larger, but has been done a few places for 10's of meters with visible light. Making it bigger it "just" a matter of refining the technology and putting it in space. There's still the issue of intensity, though; it would be nice to collect more than a few elephant photons. Some day ...
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No items matching your keywords were found.
|
|
Newport 20D20AL.2 Broadband Metallic Mirror Pyrex 50.8 mm Diameter λ/10 250-600 | |
|
US $107.99 | 28d 22h 1m |
|
Newport 10D20ER.2 Metallic FLAT MIRROR PYREX Optics Optical Laser 25.4mm round | |
|
US $64.98 | 27d 23h 38m |
|
Newport Pyrex ValuMax Mirror 250-600nm 10D520AL.2 | |
|
US $25.00 | 23d 20h 37m |
|
Newport Pyrex Laser Optic Mirror 2.5" in Diameter / f=127mm Large Optic Mirror | |
|
US $49.00 | 20d 19h 36m |
|
Newport 10D20ER Broadband Mettalic Mirror Pyrex 25.4 mm 1/10 wave Thorlabs | |
|
US $20.00 | 13d 16h 43m |
|
Newport 10D20ER Broadband Mettalic Mirror Pyrex 25.4 mm 1/10 wave Thorlabs NIB | |
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US $40.00 | 13d 16h 41m |
|
Newport Qty. 2 Round Pyrex Mirror 05D20AL.2 UV AL COAT 250-600nm NEW | |
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US $70.00 | 12d 18h 16m |
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NEW!! Newport Round Pyrex Mirror 2.0in.! | |
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US $40.95 | 11d 20h 49m |
|
Newport 10D520AL.2 Valumax Pyrex Mirror 25.4mm Diameter 1/10 Wave 250-600nm | |
|
US $29.99 | 10d 18h 46m |
|
Newport Flat Mirror Laser Optic Photonics Pyrex Diameter 1/10 Wave 450-700nm NEW | |
|
US $149.99 | 10d 8h 13m |
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Newport 20D20AL.2 Broadband Metallic Mirror Pyrex 50.8 mm Diameter λ/10 250-600 | |
|
US $107.99 | 28d 22h 1m |
|
Newport 10D20ER.2 Metallic FLAT MIRROR PYREX Optics Optical Laser 25.4mm round | |
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US $64.98 | 27d 23h 38m |
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12" Pyrex Long Focal Length Spherical Mirror M11 | |
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US $650.00 | 27d 21h 25m |
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Newport Pyrex ValuMax Mirror 250-600nm 10D520AL.2 | |
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US $25.00 | 23d 20h 37m |
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Coated Pyrex 10 x 6" 1/8 W Mirror in Mount M65 | |
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US $275.00 | 22d 21h 33m |
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12" Pyrex Spherical Coated Mirror in Mount | |
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US $400.00 | 22d 19h 30m |
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10" Pyrex Parabolic Uncoated Mirror - 1/8 Wave | |
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US $600.00 | 22d 15h 8m |
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11" f/10.5 Pyrex Spherical Mirror w/ Gold Coating for Telescope / Collimator | |
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US $995.00 | 20d 19h 38m |
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Newport Pyrex Laser Optic Mirror 2.5" in Diameter / f=127mm Large Optic Mirror | |
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US $49.00 | 20d 19h 36m |
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1967 Big Eye Giant Telescope 98 inch Pyrex Mirror Photo | |
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US $13.99 | 20d 2h 43m |
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Tranparent Pyrex $49.99 Tranparent Pyrex - Giclee Print |
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Pyrex Dish $24.99 Chaloner Woods Pyrex Dish - Photographic Print |
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The Joy of Pyrex $24.99 Chaloner Woods The Joy of Pyrex - Photographic Print |
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Pyrex Round Casserole Dish - 1.25L $9.99 This Pyrex Round Casserole Dish is practical and attractive for cooking and serving smaller dishes.Features: Pyrex glass is high quality with superior heat resistance.Material: Glass.Dishwasher safe: Yes. |
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Pyrex Vista Glass Culture Dishes, 100x15mm, 12/pk $56.91 Pyrex Vista Glass Culture Dishes, Reusable with Cover |
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Dunlop 202 Pyrex Glass Guitar Slide $3.99 Dunlop 202 Pyrex Glass Guitar Slide |
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Dunlop Wall Pyrex Glass Slide Large Single $3.99 Dunlop Wall Pyrex Glass Slide Large Single |
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Pyrex Round Casserole Dish - 2L $10.99 This Pyrex Round Casserole Dish is practical, attractive and large enough to hold a family casserole.Features: Pyrex glass is high quality with superior heat resistance.Material: Glass.Dishwasher safe: Yes. |
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Pyrex Classic Measuring Jug $6 This clear Pyrex measuring jug will help you get quantities just right. With measurements for sugar flour and liquids it's a handy addition to any home. Dishwasher and microwave safe. Comes with a 10 year manufacturer's guarantee. |
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Pyrex, Pies Four and Twenty Blackbirds, USA, 1920 $19.99 Pyrex, Pies Four and Twenty Blackbirds, USA, 1920 - Premium Poster |
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Pyrex 21x21cm Square Roaster $6.5 This Pyrex roaster is made from borosilicate glass a special blend of components that are heated to very high temperatures and melted to form glass. Suitable for all types of cooking it can withstand temperatures of 300 degrees and is microwave fridge freezer and dishwasher safe. |
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Corning Pyrex Brand Glass Stopper for Iodine Flasks, Stopper #22 $24.81 Features of the Corning Pyrex Brand Glass Stopper: Pyrex brand 22 barrel-head stopper with long handle. |
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In The Mirror $12.49 In The Mirror |
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Mirror $8.49 Mirror |
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Grinding 10" pyrex blank for telescope mirror
Where can I find these materials for my science fair project?
my science fair project is called potions and lotions where i have to create my own lipgloss. where can i find these materials?
-Beeswax
-Cocoa butter
-Shea butter
-Petroleum jelly
-Aloe vera gel
-Vitamin E liquid
-Peppermint oil
-Sweet almond oil
-Coconut oil
-Pyrex® glass measuring cups (microwavable) or small cooking pan
-Small plastic containers with lids for your gloss samples
-Microwave or hot plate/stove with a double boiler pan
-Popsicle sticks or wooden stirrers
-Cotton swabs (Q-tips®) or flat edge toothpicks
-Tissues
-Food scale that measures ounces
-Measuring spoons
-Notepad and pens/pencils
-Hand mirror
-Safety goggles
-Pot holders/hand protectors
-Apron or lab coat
Natural Food Store:
beeswax, cocoa butter, shea butter, aloe vera gel, vitamin e liquid, peppermint oil, sweet almond oil, coconut oil
Store (grocery store, walmart, etc.):
petroleum jelly, glass measuring cups, plastic containers, hot plate, popsicle sticks, cotton swabs, tissues, measuring spoons, notpad + pencils, hand mirror, pot holders, apron
School:
food scale, safety goggles
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